The question still remains: what will alternative radio (specifically Audacy alternative) look like as we go forward? We've already touched on the fact that many of the "staple" artists of the format (like the Foo Fighters) are being phased out. I will be curious to see what that means for other artists. If The Head and the Heart, Lumineers, Revivalists (etc.) put out a new album, does that mean it might get ignored as well? It seems that the format is going to hold onto some of their gold tracks, but I'm not really sure that I see a ton of room for breaking new music by many of these staple artists. New music from Billie Eilish, and other tiktok contemporaries might take precedence.
Audacy ignored "Follow You" by Imagine Dragons for the first couple of weeks of that song's release before seemingly begrudgingly getting behind it. So I would say a lot of artists from that era, especially those who have more of a "rock" sound, are potentially in trouble. For example, "Bed Head" by Manchester Orchestra, who has a similar sound to the artists you mentioned, is being ignored by Audacy currently. Rise Against and The Offspring, despite being adjacent to the pop-punk sound Audacy has gotten behind, are also being ignored.
"The Gold", which was Manchester Orchestra's previous Alt single, barely missed the top 10 in 2017, and Audacy (then Entercom) was permitting their stations to play it back then, so it shows that whatever the cutoff metric is, it's only by a few years.
Audacy got behind Twenty One Pilots' new single "Shy Away" immediately despite TOP nearly being as old as Imagine Dragons at this point, but that's probably because they're too big to ignore.
EDIT: A lot of high-profile Alt artists, old and new, are going for adds this month, and I think that'll paint a clear picture as to what is going to happen on Audacy stations and the rest of the format for the summer.
5/4 (Today):
Billie Eilish - "Your Power" (already rising fast on both Alt and pop; it's a soft acoustic number)
Cannons - "Bad Dream" (follow-up to their #1 "Fire For You"; synthpop)
cleopatrick - "FAMILY VAN" (alternative rock; this is also going for Active Rock adds today)
The Hunna - "Bad Place" (indie rock)
5/11:
Coldplay - "Higher Power" (Coldplay things)
K.Flay - "Four Letter Words" (indie pop)
Kings of Leon - "Echoing" (alternative rock)
Machine Gun Kelly - "love race (feat. Kellin Quinn)" (pop-punk)
5/18:
Joywave - "Every Window Is A Mirror" (indie rock)
5/25:
SUECO - "SOS (feat. Travis Barker)" (pop-punk)
WILLOW - "Transparent Soul (feat. Travis Barker)" (pop-punk, by Will Smith's daughter no less)