Kind of is though, now that vibe coding actually works and doesn't produce slop. At least if you have $1k or so to burn on Opus 5.5.
Just point Claude at your PHP and ask it to rewrite it in Rust. I know it seemed crazy when Bun did it (and it probably was), but it actually works now. (And please try it before you say "that's what people said 6 months ago" or whatever.)
I don't quite follow. You'd replace it with an entirely vibe coded version. It looks like a standard phpbb style forum so that would be trivial for Opus 5.5.