The one time I had visited and hadto travel longer distance in the US I took a greyhound and boy, it was a interesting experience. Back home, going by bus was the norm but in the US it's... Really different.
Greyhound is also, in my mind, significantly different than regional public transit. I consider it more like an airline for poor people. Public transit, definitely there are poor people using it, and there are also commuters, especially on the Express lines, which have a premium fare and operate exclusively during office-commute hours. (R.I.P.)
Are we talking during the covid era (eg. 2020-2022), or the post-covid era (2023+)? I can understand how flying during the covid era sucked with mandatory masks and PCR tests, but my flights in 2023 were all pleasant. All the covid protocols were lifted, and I didn't experience any long lines at check-in or at customs/passport/security lines.