It's because PHP uses a CGI process-per-request style model, while there's no good or modern for support in Python for that execution model these days (the comm

It's because PHP uses a CGI process-per-request style model, while there's no good or modern for support in Python for that execution model these days (the community is built around WSGI and ASGI instead). Opcode caching isn't actually relevant because PHP reuses the processes and in-memory structures these days as much as possible.