Oh, I agree teams that have terrible contracts would be happy to take on Devin's mediocre (with potential to become good value) and Keldon's fine contract to get off of a terrible contract that the Spurs wouldn't want. Are any of those contracts "legitimate wings" today, and not 3-5 years ago? Like, I'm sure Mil would've preferred Devin + Keldon to waiving/stretch Dame's $113M and I'm sure the Spurs weren't interested.
Also agree collecting and having short-term, mid-sized, and expiring contracts is valuable. Keldon's contract has value, it's not negative. It's perfect sized to fit into tons of deals, same with Barnes and Olynyk. Having expirings is good, parlaying those into assets is good. Turning those into PG at $55M a yr for his 35, 36, and 37y/o seasons is bad. Ditto for Dame and Beal and Lauri. Cap flexibility is good, trade flexibility is good. Having cap space that allows you to acquire guys like Barnes and Olynyk is good.
And agree on mid-size expirings makes moving Keldon/Vassel more possible, but Vassel plus Olynyck is still near max money $41M. I'd wait for a star to become disgruntled and ask out then we could easily match Ks and offer valuable...I wouldn't pull the trigger on someone you'd classify as a "max contract they regret". I don't want any obvious regret contracts in Wemby's tenture unless they are short-term (2 yrs max) and a clear win for the Spurs.