TL,DR; VSCode was just not developed with primary support intentions for PHP.
Having worked with the Big Three (Sublime, Atom, VSCode), I can say that VSCode along with some extensions have proven the best for Node.js and front end web projects.
You ever tried writing a plugin for Sublime Text? Ha ha ha 😂
Actually, I have written an extension for Sublime Text. While the documentation of the python API leaves some things to be desired, it's not too difficult.
I have also contributed to a few VS Code extensions. For someone whose main language is JS/TS, it's definitely easier.
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