(I would not use the National Review as a source, just in general.)
A potential problem is that natural immunity appears to be lasting far less time with Omicron than it was with Alpha and Delta. We're not completely certain on this, but if true it would put a huge damper on "Omicron burns itself out" hopes.
Yeah, I think if masking when sick became a norm in a post-pandemic area, you'd likely have somewhat lower case rates for the flu and the like.
Very true.