I'm sorry, but you've taken HT20 completely wrong or you're Jeff using ChatGTP as a disguise.
Yes, the band recorded dozens of things, but first and foremost they don't have to release everything, for their own private reasons. We, as a fans, sometimes we acted as a bunch of spoiled kids in the past, like in the LPU8 or LPU16 cases. Instead of complaining about what we don't have, what about if we appreciate what we got? Most of bands doesn't take care of their fanbase as LP does, releasing demos each fucking year from their vault. It's incredible after all these years we still had unreleased material, after leaking stuff from that period for a long time.
Secondly, I think this anniversary has distorted your take on reality, you can't ask for SBD recordings of every show or a making of the album, because it doesn't fucking exist. The LP who recorded Meteora was the jewel of the crown for Warner, for that they destined resources (for beginners, money), for everything LP does because they pretty know for sure that this investment is going to have a return (for beginners, again, it's called business).
The LP who recorded Hybrid Theory was, in the other hand, a band who wasn't even trusted by his own manager. How the fuck are they're gonna invest money in something they don't truly believe? "Hey, we're executives at Warner with a crystal ball and we've have seen that this band we actually despise is going to break the mold with this record, so let's film everything"
And after this rant, I think I'm gonna to open my boxset and watch my PR02 DVD, which I just discovered that it has been around in the internet since 2002, since there wasn't any second of new footage and I didn't notice.