I think anyone who's claiming that remote work has been "proven" to be better or worse is wrong. There are some studies but they use estimations and proxies, carrying the same flaws as doing performance reviews based on lines of code.
We've proven that the big tech companies can go fully remote and not completely crash and burn, that's about it. Some people love the lack of commute and less semi-forced hanging out, some people hate onboarding on a new company as a remote person and so on and so on.
I personally prefer a company where everyone's on site. I want to be able to quickly resolve any issues in person, not over voice call or slack, and I think that an environment where someone can tap me on the shoulder when they need help leads to overall higher productivity, even if individual productivity suffers temporarily.