I'm personally excited by CHERI, and feel it is part of (sorry if these words annoy some people) computing "growing up". It's interesting (to me at least) that that is the only trick I can think of (along with general pointer compression tricks, like interpreters storing 63-bit integers when a pointers last bit is set to 1), where CHERI shouldn't be (fairly) trivial to support.

I'm happy to sacrific xoring pointers, the same way I wouldn't use some "cunning trick" to build my house with half as many nails, at the risk that any minor mistake installing any of those nails would lead to my house failing over.