Pop has made a LMA/DMDR/Gay trio productive. I know most folks are pessimistic about how far that trio can take the Spurs, but they've already gone way farther than folks would have thought. Cousins in SA can work, if both sides want it to. It's honestly ridiculous that people are ignoring the tremendous talent infusion he'd add. Let Pop work on the fit. That's what he gets made so much for. If he doesn't see a way to do that, this won't happen anyway. Worst-case scenario, the Spurs cut him early in the season and eat $3Mish. Best-case scenario, he buys in and becomes the ceiling-raiser the team needs now and finds a way to stick around like a younger and better Gay and grows into foundational big the Murray/Walker/Samanic core needs.
We're talking about a min or min-esque deal here, not the four-year MLE. There's almost zero opportunity cost.