> An XQuartz installation consists of many individual pieces of software which have various licenses. The X.Org software components’ licenses are discussed on the X.Org Foundation Licenses page.[1] The quartz-wm[2] window manager included with the XQuartz distribution uses the Apple Public Source License Version 2.[3]

* https://www.xquartz.org/index.html

Just looked it up, that Apple license is indeed approved as open source/free software by the FSF and OSI!

Ah, I can see that the binary blob is not needed anymore. Nice.