What would satoshis vision be today? Vision on the ecosystem be different? Cross/side chains...bridges? Or more so just very simple economy p2p txs? So no massive amounts of apps/services/games etc? There are things C does well, just like Haskell, and solidity.. I wonder if THEY would ever come to terms with interoperability. BTC, Ethereum, and Cardano (c ,solidity,haskell) have some great things coming along.
If I were him, I would do nothing. He left the project to the community, the project is still going, it's still strong, no matter what happened in the last 10-12 years, and many things happened. Maybe he'd like to speed up the adoption somehow, that's the only problem in my opinion, but just like all good things, they take time.