Obviously, the "pros" of WFH are massive. No commute. Comfortable office. Food in the fridge. Daytime exercise + showers. Etc. etc.
I found however that too much of a good thing, is bad. For me, the lack of in person communication started to atrophy my enjoyment of life. I wouldn't have been able to really tell you it for the first few years, but I was slowly moving toward being mildly depressed.
Returning to office restored my excitement for my work. I credit my colleagues and the process of working toward a big goal with other people. We really underestimate how important this is for mental health.
If you're in office and you now what I mean, show some love to a fellow co-worker. You gotta admit it's nice to see each other.