OG Bitcoin builders who never stopped shipping:

Zooko - talked to Satoshi in 2008, dropped the first $BTC blog post Jan 2009, fixed early bugs

Sean Bowe - co-authored BIP39 (the standard for seed phrases)

Andrew Miller - co-wrote Blockstream's sidechains whitepaper

Daira Hopwood - got props directly from Satoshi

While most early $BTC maxis cashed out and disappeared, these devs kept building.

They're now core contributors to $ZEC.

Real builders don't retire. They iterate.