[mundanevoice]

This can be said for any rewrite. Let's wait and see what happens to Neovim's code in coming 10-15 years if it can last that long. When you have to support all the legacy systems and all types of OSes out there, crap is going to come in the code.

[riffraff]

To be fair, supporting all legacy systems and all types of OSes seems to be an explicit non-goal of neovim.

[mundanevoice]

Neovim does have breaking changes from Vim, that by definition make support for some of these systems very hard or impossible.