I don’t know, 3-4 days doesn’t sound particularly “slow” to me!
As I’ve gotten older, I’ve gotten more flexible on all accounts and embraced the fact that different people will travel for different reasons at different times. Which is fine.
When I was in my 20s and first traveling, I wanted to “see” things, which sometimes meant focusing on the “highlights”. Which is fine. There was so much I hadn’t seen.
These days, I’m much more interested in “doing” things. Usually connecting with friends, or some sort of activity (obviously wine visits are an activity for many of us here).
But it all depends on the trip.
And obviously if you really want to “connect” with a place, you need to live there, ideally for at least a year, so you can go through the different annual rhythms.
We had a good thread on this question, especially as it relates to meals, here: