It depends on the language you are using and maybe the size of your project. I did Ruby, Python, and Go development for years using only Vim and really enjoyed

It depends on the language you are using and maybe the size of your project. I did Ruby, Python, and Go development for years using only Vim and really enjoyed it. But the minute I started working on big Java and Scala codebases, I started struggling. I tried different LSP, completion engines, and debugging plugins, but I couldn't find the proper setup. The IDE Vim modes are decent these days but still lack those more advanced features to manage your buffers and windows for example.