I think I missed part of the story. Is there something wrong with Vim 9? Is it heavily LLM-driven now? That's the only hint I could find on the Vim Classic site.
With respect to the creator, Vim9 script is inferior to Lua in terms of adoption, learning curve, stability, features and probably performance. If the purpose is to serve users a new DSL is not really defensible when Neovim has proved Lua works
I only noticed it when a slew of security holes (re-)introduced by uncritical merging of LLM code got CVEs assigned.
Luckily I was lazy running a custom build of vim and hadn't updated since they started lowering the merge barrier (or however you can put this politely).
I hoped the people that wanted neovim features would've stuck to neovim instead of pushing vim to accelerate, but it seems like free LLM tokens made it a bit too tempting.
edit: I'm regarded, I misread your post, ignore me.