I think WFH is great for individual contributors (especially software engineers) that are a fraction of a team that has some people who go into the office every day. It can be a really easy way to let those people focus and be productive without arbitrary hours.

However I have seen what happens at a company that is all-remote and it can be a disaster. My girlfriend worked remote for Cisco for 2 years and almost nothing got done. The latency on all-email communication was too high and you never knew what was going on because nobody had a full picture of the state of the project. It was a total mess.