But is this still really python? This compiler and others are not a drop in replacement. They typically cover a narrow subset and/or need additional code/hints

But is this still really python? This compiler and others are not a drop in replacement. They typically cover a narrow subset and/or need additional code/hints etc. You can adopt it incrementally, but then you could just as well switch to a language with higher default performance, more language features that just work, unified tooling etc. and adopt that incrementally?