I think we're continuing to march down that road in various ways, if you look at smartphones, iPads, even arguably MacBooks now, (I know enthusiasts have hacked their own Linux onto M1 but still ... Not open)
Hardware is still totally not open, period. Try buying a PC with an open source BIOS or CPU, you can't!
The "open firmware" marketing term is a bit of a misnomer here as there is probably plenty of closed source firmware in those devices in various components, but at least the BIOS is open source.
Linux on M1 wasn't a hack, apple allowed it to happen. There is certainly a lack of hardware docs (which is unfortunate), but apple did nothing to prevent users from being able to execute their own kernels, which I'm happy to see.
Hardware is still totally not open, period. Try buying a PC with an open source BIOS or CPU, you can't!