Based on recommendations from @khem and the nvim-lua/kickstart.vim README, I tried LazyVim. It is now easy to run in parallel with your existing Neovim configuration using the NVIM_APPNAME. The result is amazing.
Demo:
One of my favorite features is to be able to turn off auto-formatting on the fly with <leader>uf. This is very useful when working in OSS projects where you want to make a small change and not re-format the entire file with your preferences.