While many of these arguments are valid - if I am purchasing my seat 2 months in advance Amtrak has my money already and I have paid for that seat. It's the benefit of having more to choose from if you book early. Same with a plane. While I realize a plane only goes from point A to point B, it is similar in that you have greater availability early. I would fully expect that if I wanted to CHANGE my train to an earlier or later one I would have to take whatever is available. I am a regular rider and have been for 15 years - wouldn't it be nice to get some benefit to pick a seat? Maybe that's how they do it - make that an extra perk for Select/Select Plus riders...again, like airlines do for their "frequent flyers". All of which is doable on Airline apps and could be on the Amtrak app if they figured it out.
There are several issues:
(1) VIA is a bit closer to the airlines insofar as you don't get a
huge amount of turnover en route on a number of trains. My experience is quite Business Class-centric, but the turnover between Montreal and Quebec City and Montreal and Ottawa is close to zero. It skews a little higher between Montreal/Ottawa and Toronto, but not a lot. On Amtrak (particularly on the VA-Boston Regionals), a seat can
easily turn over 3-5 times, so misaligned seat assignments run the risk of turning over a non-trivial number of through passengers. I would rather not see Amtrak lose perhaps 5% of through capacity because of seating preference misalignments. Please note that this
is a known issue on the LD trains...more than one AU member has had to switch roomettes partway along a trip (the Builder is one of the more frequent offenders IIRC) because of misaligned room availability. Now, I know that's a case of 20-40 roomettes versus a few hundred seats, but I think the point is still the same. The chance of this sort of mess is increased if a train ends up adding or cutting cars for a given run.
(2) There's also the fact that a VA-originating train takes about 6-8 hours to get to New York. You'd need to either (a) require seat selection to be locked in prior to departure from origin or (b) require everyone to have a seat assignment or you're going to run into a situation where somebody wants to move to an empty seat and someone down-line reserves it and you have problems unless the conductor mucks about with it on his app.
(2a) If you go to universal seat assignments you also run into losing the ability to marginally overbook. Given that Amtrak
can accommodate a hatful of excess pax in the cafe (in particular) on most trains, I think this is another loss to seriously weigh.
(3) And then there's the fact that boarding is functionally restricted to 2-3 doors on a train at low-level stations for high-level trains (e.g. Regionals in Virginia).
This is a problem because if you have an ADA passenger boarding and the "wrong" door is opened (or in some cases, you can't platform the right cars without an extra spot) then you're either going to have to switch doors, re-spot, or force the passenger to pass through potentially several cars.
(4) Speaking to my experience last week, trying to move seats around if you've got a party split over two (or more) reservation numbers is a real pain, and if you go to an "automated" assignment system this can get you into a spot if you're trying to pick seats for a group. Again, to date in the US the only trains that do this are the Acela (in First) and Brightline (with three stations and four cars per train).
(5) Finally (in this litany, at least), trains
do run with variable consists. Telling two dozen passengers in Coach 6 that, well, today we're running with five coaches (as a seven-car train) and you've got to re-pick your assignment? Not a great situation, and this can happen a lot more than equipment swaps tend to happen.
Honestly, even as somebody who has occasionally had to fish for a seat (and has wound up parked in the cafe once or twice), I think this would be a craptacular "improvement". I'd also note that, like airlines, I have little doubt that somebody at Amtrak will try to find a way to monetize this...and I don't like that prospect, either.
So, with all due respect, if you're S+ or SE (and I've been SE for
years), I think you've got a number of solid benefits and perks such as being able to reliably pull an upgrade on many trains if you've got the upgrade card to offer (as opposed to hoping for a pleasant surprise at the gate) and lounge access both with Amtrak
and United. I don't think that piling a "seat assignment" benefit into the mix under most circumstances is a net add for anyone.