Context switching is expensive.
Not because tools are slow, but because switching intent takes effort.
When I’m reviewing a document and notice a unit mismatch, I don’t want to open a complex app or search through multiple tabs.
That interruption breaks the flow.
For these moments, I prefer static or near-static references.
They don’t demand attention. They just answer one question and get out of the way.
Sometimes that reference is a note.
Sometimes it’s a small page like https://mmtocm.net
that helps confirm basic unit relationships.
After that, I close it and return to the task.
The less friction a tool introduces, the easier it is to stay focused.
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