When it comes to making stuff freely available to their fans, Genesis are the complete opposite of Eagles. Every tour they did was broadcast live on the radio or even on TV. Phil Collins would routinely leave every band concert or session with a soundboard copy of the performance for his own critical perusal and he ended up with an extensive archive of material.
In the early days of CD Bootlegs, Phil said he was concerned that fans were paying extortionate fees for lousy sounding bootleg recordings. I guess the fact that, soundboard recordings of practically every Genesis (and Collins solo) show, are now, easily available on the internet, even advertised on the Genesis fan site, suggests that Phil has quietly made his archive freely available to the fans.
When Genesis dug deep to find rarities to put on their first box set they were surprised at the amount of stuff that they heard about, after they'd released it. Many people had Genesis obscurities stored away without realising how rare they were, until the rarities box set came out.
As far as I know, The Eagles don't have an archivist. Henley is strongly against this type of material being made public at all . He's not even keen on Live Recordings so I can understand any one, with illicit Eagles recordings, fearing litigation and excommunication, staying very quiet about it.
I thought the Bill Halverson recordings would be the start of obscure Eagles material surfacing (How great would they have been on
Eagles Selected Works) but it hasn't happened. I can't believe that Halverson was the only guy who ignored the Eagles request to destroy everything.
I'm still confident that I'll hear something, previously unreleased from the Eagles in future, even if it was actually recorded decades ago, it's just a case of being extraordinarily patient.