> Is it just me or does anyone else feel over the decades they've been divesting some of the best (long term) building blocks?

Staying at home, the best thing I found to play with is built "digital lego" MOCs using LeoCAD app + LDraw Parts Library.[0]

Seems like IBM CEOs, stayed at home for a long term, just found own "lego-like" game to joy ;)

[0] https://github.com/Symbian9/AWESOME-LDraw