I have serve-web running as a service, but that only works well on desktop screen layouts — from my experience, it runs terribly on mobile.

Congrats, if you're trying to write software from your phone you should be fired as a software engineer.

Again, it is stupid as fuck for any software developer to use VIM. If you have to telnet into some random bullshit server for whatever reason you're obviously in a different position. But real, good, maintainable software is not written and built by teams insisting on creating learning curves for no reason.