Optimal situation is the Spurs make the playoffs the next two seasons. At that point, the Spurs will have a seamless transition to the next era as DeRozan, Aldridge, Gay, Carroll, etc. will be gone and/or free agents. By that point, the Spurs will know exactly what they have in White, Murray, Walker, etc. and can build their strategy around that core. If none of the youth develops, the Spurs could do a teardown. If a few more pieces could turn the team into a contender, you can go that route.
I know Spurs fans are tantalized by lottery balls but avoiding a teardown this season would make for a smoother transition. It's easy to tank -- it's a lot more difficult to untank, especially when it's a spur of the moment tank.
So, no, I don't go for a teardown just because a team dangles a first round pick. That's especially true with how all the contracts are aligned. You do a halfway teardown now and then you can be left with a toxic situation that takes years to recover.
Going into the season, it was obvious the Spurs were aiming for that two-year glide where they can ease their way into whatever is to come next. Going away from that idea while the playoffs are still possible would be unwise.
Peaceful and strategic gliding in 2020