I don’t personally believe there is an actual performance boost. I think I is the opposite, and even where it might exist at the individual level I think it is certainly (to my eye) incorrect at the team and company level.

But I won’t make that argument because it is the third rail of HN comments. So I make all my arguments assuming WFH improves productivity.

You can also stipulate that short-term productivity didn't take a major hit for the most part while having concerns about onboarding junior people, reduced level of engagement on teams, weakened company culture, etc. It's hard to separate out other factors but it sure feels like that to me.

I agree with you on this as well, but this is HN and WFH is a shibboleth that you’ll get downvoted for questioning.