Acela is really priced for expense accounts. Given that the entire Boston-NYC route was electrified for Acela anyway, it rarely makes sense for me as an individual to pay for Acela vs. the Regional. It saves maybe an hour and gives you a slightly more comfortable car but it's 2x the price.

I rarely take it but MBTA commuter rail has really gotten pricey. There are passes but I'm almost $30/day to commute into Boston by train between parking, the ticket, and the subway on the other end.