I was going to take the 8:35 Amtrak to Boston last night. It was listed as on time...but getting there early (7:50) as is my wont, I noticed that the 6:35 was just pulling in. I dashed out to the platform, asked the conductor if I could get on this train and after a moment's hesitation -- she said my train was going to be there in half an hour; I said "yours is here now" -- she said c'mon. Full train but comfortable seat and trying to make up for lost time, they were a few minutes faster than the regular train.
The only drawback to not having my car here in Boston is for grocery shopping. I can either take the T (or a long walk, not fun in the heat) and carry what I can carry or I can get delivery via Peapod (www.peapod.com ). Peapod has a $50 minimum, so it's not for my every shopping excursion but I think that'll be OK for most situations.