Coc.nvim is awesome. Instead of trying to bring the UI of vim to another editor, coc.nvim brings the "backend" of the other editor to vim.

I tried using VSCode with the Vim plugin for a while but the latency and inconsistencies eventually got me back to proper (neo)vim. UIs are almost always more complex and subtle than people intuit, have a large surface area, and make lag and inconsistencies most noticeable.