Haven't done an 8 hour trip. Have done several 2-2.5 hour trips. In traffic. Which can suck. Different issue.
If you don't mind the getting in and out (more out), then I think you might be ok on the longer drive thing. Haven't been in a tight parking situation per se because I try to avoid parking near other people
in my home garage it hasn't been an issue.
On the longer drive thing:
You notice the lack of a lumbar support. More so because that allows you to change how your back hits the seat than anything else. Not a big deal, but I notice.
The snugness hasn't been an issue. If you have the acc / self driving aids, no problem relaxing a bit and letting the car do the go and stop pedal and you mainly focus on steering.
I am taking mine to the track from time to time and it is for that reason, mainly, that I got them.
I hadn't thought of the passenger seat "hands" issue.