I don't think US had that extra section policy since the 1990s...it was Delta who had the policy last, and I think they eliminated it in 2005 or so.

Really up until COVID hit, the schedules were largely the same as they had been (except for Saturdays/Sundays) but the frills have slowly been taken away except for the free wine and beer, and sampling of crappy magazines in the gate areas of DCA/LGA/BOS.

Amenities were quite good on the US Shuttle until around 2003 or so...Bagels in the morning, deli-meals during lunch/dinner hours (sandwich or salad with chips, cookie, and bottle of water), fresh fruit and other "gourmet" snacks during non-meal hours, Fox News on the overhead monitors that was updated twice daily, more legroom, and of course free wine/beer. Most of those amenities went away when the Shuttle ceased to exist in the single-class configuration in 2004 when they started using standard mainline aircraft, although the morning bagels lasted a couple years longer before being turned into this gross donut bar they used to serve.

One thing I did like is how they would deplane through both 1L/2L at DCA, and several shuttle gate areas in the terminal were equipped with staircases to implement this.