Awesome

crazy8.nvim

NeoVim plugin that automagically configures 'tabstop', 'shiftwidth', 'softtabstop' and 'expandtab'.

Currently comes with no configuration options. It silently sits in the background and does its job when needed.

Final words

Plugin works but it may be too smart about 'tabstop'. Personally, I started using vim-dent that I'm quite happy with: fast and perfect (for me so far).