There are a lot of ways to choose a software development platform.
Some teams choose the most popular one.
Some choose whatever the developers already know.
Others choose based on licensing cost.
None of these approaches is necessarily wrong.
But for business applications, I'd argue that the first question should be:
What is this application actually going to need to do?
Because a framework that is perfect for a marketing site may be a frustrating choice for a data-heavy enterprise dashboard.
Start With the Hardest Requirement
Before looking at frameworks, identify the hardest part of your application.
Is it:
Millions of records?
Complex dashboards?
Real-time updates?
Lots of concurrent users?
Mobile support?
Enterprise integrations?
Accessibility?
Security?
Very fast delivery?
That requirement should heavily influence the technology decision.
Performance Isn't Just "Page Load Speed"
For business applications, performance can mean much more than initial loading.
Imagine a user working with a table containing hundreds of thousands of records.
They expect:
Filter → instant feedback
Sort → responsive UI
Scroll → smooth rendering
Edit → immediate response
Export → predictable performance
That's a very different problem from loading a five-page marketing website.
For applications dominated by data interaction, I'd specifically evaluate frameworks that have strong data-grid and rendering capabilities.
This is one reason Ext JS is worth considering.
Its component library includes advanced grids, charts, forms, calendars, pivot grids, and other components designed for enterprise applications.
Don't Underestimate Components
One of the biggest development costs is rebuilding functionality that looks "simple."
A basic table is simple.
An enterprise-grade grid isn't.
You may eventually need:
Sorting
Filtering
Grouping
Column resizing
Locked columns
Inline editing
Validation
Virtual scrolling
Export
Accessibility
You can build these yourself.
The question is whether you should.
A comprehensive component library can turn months of implementation work into configuration and application-specific development.
Integration Should Be Tested Early
Your application probably needs to communicate with other systems.
Test your actual:
APIs
Authentication
Databases
CRM
ERP
Internal services
during the proof-of-concept stage.
Don't wait until month six to discover that your preferred framework doesn't work well with an important backend system.
What About Security?
For business applications, security shouldn't be something added at the end.
Look at:
Authentication
Authorization
Dependency management
Secure data handling
Browser security
Compliance
Vendor support
The more regulated the business, the more important this becomes.
Think About the Developers Too
A technically powerful framework can still be a bad choice if the team can't work efficiently with it.
Consider:
Learning curve
Documentation
Developer tooling
Debugging
Testing
Component reuse
Community/vendor support
Hiring availability
The best framework is useless if it makes every feature unnecessarily difficult to build.
And Then There's TCO
Here's where framework comparisons often become misleading.
A free framework can still be expensive.
A commercial framework can sometimes be cheaper.
Why?
Because the actual equation is closer to:
Total Cost
= License
- Development
- Maintenance
- Infrastructure
- Training
- Support
- Migration
If developers spend hundreds of hours building functionality that already exists in a commercial framework, the "free" option may not be free anymore.
Where Ext JS Fits
I wouldn't recommend Ext JS for every project.
If I'm building a simple consumer website, I'd probably look at other options.
But if I'm building:
An ERP interface
Financial dashboard
Operations portal
Business analytics application
Data-heavy admin system
I'd definitely evaluate it.
The combination of its component library and data-handling capabilities is particularly relevant when sophisticated enterprise UI is the core requirement.
My 7-Point Checklist
Before choosing an application development platform:
Define the use case
Estimate data and user growth
Benchmark performance
Test real integrations
Evaluate security
Calculate 3–5 year TCO
Build a proof of concept
The POC is probably the most important step.
Build the hardest screen.
Use realistic data.
Connect the real API.
Then see what happens.
Final Take
I don't think there's a universal "best framework."
React, Angular, Vue, Ext JS, and other frameworks can all be the right choice depending on the problem.
The mistake is choosing based purely on popularity or price.
For complex, data-intensive enterprise applications, I'd put Ext JS high on the list because its built-in components and data capabilities align closely with that use case.
For other application types, a different framework may make more sense.
Choose the technology based on the hardest problem your application needs to solve—not the easiest demo it can build.
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