The “trusted setup” is gone with Halo2—and with it, the only plausible argument that XMR users ever raised against zk-SNARKs.  The cryptography now has a ton of research, peer review, development, and improvements; it is no longer bleeding-edge “moon math” that nobody understands.  It has been fielded in production for years, and it has worked for years in the real world.  Nine years after the first breakthrough research papers, I think the technology is just now hitting initial maturity as of 2022.  Those who always wait for Version 3.0 may observe that, in accord with their long-declared roadmap, Zcash just opened their third shielded value pool about two weeks ago; it has a codename indicating that they think it’s now all grown up (“Sprout” to “Sapling” to “Orchard”).

Instead of dumping on “Zcrap”, why not push to bring the same technology to Bitcoin?  It’s open-source.  And then, we could probably enjoy seeing Snowden tweet about how BTC has the best privacy.