For me, the most productive environment for writing and reading code is an editor with rich language support. Text editing ergonomics and startup time are completely trivial aspects of the user experience compared to proper language support. Although vim is improving, its plugin system, configuration mechanisms and plugin ecosystem is an afterthought and requires way more fidgeting, setup and hacking to just barely be useful.

When I made the switch, Bram was still vocal about how he regarded the sort of language support plugins I wanted as undesirable or irrelevant, and made no effort to accommodate things like LSP. This has changed, but at this point, it's too late. VS Code supports all the languages I need through a set of plugins it wouldn't even be possible to implement for vim, with no fidgeting required. Although I still love vim's text editing capabilities, they're not nearly enough to tip the scales.

I still use vim for quick text file stuff, and even write commit messages in vim in VS Code's terminal. For actual development though, it'll never be as powerful and low maintenance as VS Code.