Is the Covid situation substantially different enough today to shift policy?

Yes, that is very much below the fold. In particular, it’s all after the big bold instructions under green, yellow, and orange conditions, none of which even hints that you might want to wear a mask to protect others. The focus is very much on incoming masking, not outgoing masking, at this point.

The very first CDC recommendations, that were widely interpreted as “don’t wear a mask, it will do more harm than good” actually said that you should wear a mask if you had covid or were caring for someone who did. But they buried that under a lot of discouraging stuff because there weren’t enough masks to go around. And they knew damn well that they were discouraging mask wearing, even while including that language This is only barely better. And it’s for similar reasons. There’s political pressure to say, “everything is fine, don’t worry, be happy”.

We visited Florida 2 weeks ago, and masks were similarly uncommon. Nobody wore them on Amtrak, either, to our immense sorrow: one of the problems with the Auto Train, COVID-wise, is that you have to wait for a fairly long time afterward, and a non-trivial amount of time before - and if the weather is awful, you don’t have much choice but to wait in a single large indoor area with several hundred walking Petri dishes. Pair that up with basic handwashing being essentially impossible on the train, and it’s no wonder we caught Covid on the trip.