Thanks, I just started using it, seems awesome. I found though that after hiding "reply"s once, I can't get them back.[0] They reappear for 1/3 of a second then disappear again. But I've realized "reply" really is never needed at all - just click on the comment time to get to the reply page. Just that one feature makes every HN page much more readable. HN should change to be like that, I think. The new comments thing is cool too. And blocking/muting will be very satisfying next time someone is a twat to me on here :-) Strange how it's not more popular. The vast majority of comments on HN about it are yours!
[0] FF 98.0.2, macOS Monterey M1