vimfiles VS nvim-dap

Here's how I override some groups (requires some Vim script understanding) https://gitlab.com/egzvor/vimfiles/-/blob/b3f6916ae9b639e0914b136a7d53f86abeca12ba/pack/integrated/start/vim-mycolors/autoload/mycolors.vim

Take a look at my config. I extracted this plugin into its own package in order to have an autoload directory specifically for it https://gitlab.com/egzvor/vimfiles/-/blob/main/pack/integrated/start/vim-textobjects/plugin/textobjects.vim

:b filen - not sure what you don't like about it, but I use it for switching between files all the time. Or some version of it. You can improve it by using :ls t:b filen (you can map this! nnoremap b :buffers t:buffer) or go as far as creating a plugin to list buffers in a certain order (https://gitlab.com/egzvor/vimfiles/-/blob/main/plugin/buflist.vim). You could also try a fuzzy finder instead.

[2] I haven't extracted it from my dotfiles, but you can just copy it https://gitlab.com/egzvor/vimfiles/-/blob/main/plugin/marks-maps.vim.

Specific to Python dev, I used ALE for linting and UltiSnips for snippets. My config is here https://gitlab.com/egzvor/vimfiles/vimrc.

Implementation in my config https://gitlab.com/egzvor/vimfiles/-/blob/main/plugin/buflist.vim

There are DAP extensions for both Vim (e.g. https://github.com/puremourning/vimspector) and NeoVim (https://github.com/mfussenegger/nvim-dap). I can't speak as to the experience in detail (I think I briefly played with nvim-dap a year or two ago), but I suspect that for most it will be good enough.

https://github.com/mfussenegger/nvim-dap/issues/1062 https://github.com/mfussenegger/nvim-dap/issues/737

Also, you can set up debugger integration with https://github.com/mfussenegger/nvim-dap .

You could use nvim-dap with nvim-dap-python.

I'd suggest starting with a Neovim distro that makes things work for you and as you get familiar you can transition to a more custom configuration as you see fit. If you want to do it by yourself then the most popular plugin for debugging in Neovim is nvim-dap and there is also an extension for Python to give you a more ready to go config instead of doing it yourself. You should read the docs of those 2 to see how you should customize accordingly your configuration.

(neovim only) nvim-dap

https://github.com/mfussenegger/nvim-dap + https://github.com/theHamsta/nvim-dap-virtual-text should be able to do it, I think?

If you want to debug types in TypeScript, you could use marilari88/twoslash-queries.nvim. If you would like to debug TypeScript/JavaScript code, then you need mfussenegger/nvim-dap, you could read this article: Debugging using DAP to understand how to set up it.