Depends
There are great office startups.
There are also terrible office startups.
There are great remote startups.
There are terrible remote startups.
There are great hybrid startups.
There are terrible hybrid startups.
It's more a leadership question.
I completely agree that fully remote tends to slow things down. Especially, at a start up. I'm a strong believer in working from office at startups. Helps bounce of ideas, discuss problems, and explore solutions at a much faster pace.
Of course it comes with some sort of flexibility.
Questflow