As others have said, the fact that they're letting the ecosystem settle before including something out-of-the box is beneficial in some sense. It's allowed time for experiments (including my own "how would I do UI in Neovim: morph.nvim [1]").

For some, this stage of a project attracts tinkerers and builders, and lets the community shape how things are done in the future. It's not always practical, but it does have a certain appeal.

[1] https://github.com/jrop/morph.nvim