Back before COVID, the German intercity bus company Flixbus looked into the business side of bus+bike:
https://docplayer.net/104534988-Flix...e-tourism.html
Bottom line: this could be a competitive advantage and make money.
Fun fact: Flixbus recently purchased US intercity bus giant Greyhound.
An opportunity! Could intercity bus transportation for US cycletourists improve? Oh, yeah. Will it? Probably not. 1) Lawmakers and regulators in the US don't seem to be aware there is an intercity bus industry in America, or if they are, they treat it like a nuisance. 2) I haven't found anyone in the US cycletouring scene who's reached out to Flixbus US (or any other US intercity bus company) to partner, encourage and mentor them. 3) Many of the cyclists I've mentioned this to quietly admit in so many words they "don't want to ride in a bus with 'those' people".
Well, back to Amtrak.