This is absolutely terrible. It may be in the business interest of Nintendo but the absolute anti-consumer way this is carried out destroys all the good will that the customers still had towards them.

It seems someone hosts a mirror: https://git.naxdy.org/Mirror/Ryujinx/

I was able to build the project with a single command, so there's hope that easy barrier for entry and a language more developers are familiar with will ensure the survival.