What?
Press % to jump between matching parens, if ... else ... end blocks, function() ... end blocks, highlight those keywords, etc.
Basicially github.com/andymass/vim-matchup
Why?
As the Neovim's default plugins matchit and matchparens are not going to support treesitter anytime soon (not a fact but a speculation), a lua version of something that does this would be nice
Potential existing implementations:
github.com/andymass/vim-matchup
Potential pitfalls:
afaik, treesitter integration to Neovim is dependent to nvim-treesitter and its plugins, so any plugin that works on nvim-treesitter would be prone to bugs and errors in those plugins.