Only issue here is assuming we have a young core. This board thought we had a young core with DJ, White, Primo, Poeltl, and KJ in the fold. Now we have KJ, Poeltl, Vassell, and Sochan (won't include Tre in a "core").
I'd say it's feasible only Vassell and Soxhan are left in 2 or 3 years. Maybe even just Sochan.
Thus, I'm not sure there's really a core per se that we should be worrying about maintaining or protecting from trade.
That said I'm high on Langford's future. Collins could be a solid piece. Combined with Vassell and Sochan there might be enough to build around if we get Wembanyama or Scoot.