It's still an ugly, tasteless architecture, though. That is a bit odd thing to say about it, considering that many of the goals are being resurrected these day

It's still an ugly, tasteless architecture, though. That is a bit odd thing to say about it, considering that many of the goals are being resurrected these days because its become clear that the RISC/UNIX model is insufficient for modern computing. Sure they may be "pretty" and KISS, but they quickly end up being polluted by ugly hacks to make them both perform well and more recently have layers of cruft added for security purposes. You need look no further than aarch64, particularly the 8.x supplements, or the ARM CHERI efforts to see this in action.