>> No, there is currently no agreed schedule for this. > > almost all extensions has not meson support still
Extensions shouldn't necessarily be built using the same build system as the PG core. I can build PG using Meson and then install a 3rd party extension using `make install && make installcheck`. In other words, we can stop supporting Autotools for building the core without affecting extensions. Unless I'm missing something, of course.
But when you use autotools for extensions, then you still should to maintain it.