The vast majority of my young friends are uninterested in jobs which would provide lifetime employment. (As am I.)
Honestly, it was incredibly risky for HubSpot to hire Lyons and the outcome seems predestined. He came in with completely mismatched expectations and an ax to grind.
This is also a huge contributory factor to ageism in tech. Of course you won't hire older people when they expect lifetime employment at a startup which might not even exist in a few years.