Migrating a legacy PHP code-base to .net maybe
The activity graph on GitHub says it is mostly dead. There is some activity, but at best it is in maintenance mode. It used to be sponsored, but not anymore IIRC
https://github.com/peachpiecompiler/peachpie/graphs/contribu...
Benefits of this are dubious at best. The php interpreter is already a low level C project so why replace that with .net? Makes no sense.
You are comparing apples with pies here. PHP is a interpreted language, while .NET is a compiled target.
However, this peachpie project seems to be far from stated goal and more of a research project currently.