nvim-config VS dotvim

I have a whole file full of mappings like this that let Vim recognize various special key combinations from any terminal emulator I've used in the last 20 years. It's a mess: https://github.com/mgedmin/dotvim/blob/master/plugin/keyboard-workarounds.vim

https://github.com/mgedmin/dotvim, accumulated over many years.

So, three out of four? https://github.com/mgedmin/dotvim

Assuming I understood your desire correctly? I have a function to jump to the original (or patched) file when I press Enter on a line of diff: https://github.com/mgedmin/dotvim/blob/master/ftplugin/diff.vim

I use a custom foldexpr. I've been using it for many years, and polished it to do the right thing on all the codebases I've used it on.

My ~/.vim/ is a Git repository and I make it support older versions of Vim by checking for the existence of features before using them, because I couldn't stand my .vimrc emitting any errors on Vim startup. If you're interested, it's here: https://github.com/mgedmin/dotvim/

The primary reason why I need timeout/ttimeout is to have a working Escape key, when you also want to have custom bindings for various key combinations (e.g. ctrl+shift+arrows) that aren't natively recognized for your terminal for some reason, and thus you end up creating compatibility mappings for them.

My ~/.vim is here, if you're curious about the details: https://github.com/mgedmin/dotvim/

I'm perfectly happy with ~/.vim in a separate git repository (mine), with all the plugins installed via vim-plug.

My vimrc is, uhh, big, but I've tried to keep it commented.