I've been full-time remote for 9 years, and the part that's really taking a toll on me is that, without third places, and without work, I have only the "first place". And that's just not enough to be healthy.
For family reasons I've been inconveniently far from offices for a while, and have a really good employer that allowed WFH (long before covid), but I've gotten pretty convinced at least 2 days/week in-office is probably important for my mental health.
I'd encourage anyone to consider if full-time remote is working for you; maybe it is, and for me I think it did for a time, but most of us humans (even introverts) are social creatures, and unless you're good about finding a third place, or making friends elsewhere, work is still a really good place to do that.