Houston didn't seem to try to get its picks back from OKC. Harden may not really have had that kind of value though. Durant definitely did, and as we can see, the Rockets seem perfectly willing to give the Nets their picks back for Bridges. The Nets have balked despite being a couple of free-agent misses from giving up multiple lotto picks. It's easy to explain why in their case -- they aren't tanking. They want to win, and they think between Bridges, the Suns picks and their perceived free-agent advantages, they could build better not doing that.
It's rare to have all-in teams in the first place, but the number of all-in teams that fall apart quickly doesn't seem that rare adjusting for that. Teams usually make deals like this in order to respond to a closing window, so the result if often that those teams find themselves in a position where they have to sell off pieces. ATL's trade wasn't even that all-inish. It's only because the picks were pushed out three years that really makes this seem separate from the Siakam trade. Normally, we'd be talking about just a 2025 pick being open. The market went crazy for a couple of years with very little to show for it for the teams that spent all those picks. While I'd assume we'll see more conservative offers from teams going forward, I think the value of having a team over a barrel has been demonstrated enough. That's even more true if the Hawks choose Murray over Young, since they wouldn't be doing that to tank and may not see Murray, Johnson and some return as a team that would give up valuable picks they would prioritize getting back from SA.