The main issue preventing smooth scrolling is it will require each split to be an independent neovim instance, which is (in my opinion) not quite as nice as nat

The main issue preventing smooth scrolling is it will require each split to be an independent neovim instance, which is (in my opinion) not quite as nice as native splits. There is a feature in development that does use a separate view for each split and smooth scrolling is possible if you are willing to give up your native splits. In practice I haven't noticed it because I don't use the mouse for scrolling.