[overeater]

This Reddit post offers an explanation,

"From what I understand (second-hand info), personality not productivity drove this decision. He ran an unhappy lab, and he was arrogant even for MIT. I can definitely see that in the way he presents himself, so I can give credence to that explanation. Don’t know personally so he could be a great guy and I’m wrong, but there are valid reasons someone can be denied tenure even with research that goes above and beyond, and it isn’t hard to imagine that being the case here."

https://www.reddit.com/r/Professors/comments/sv34ez/tenure_d...

[sva_]

It does sound plausible, but I wouldn't put too much weight on such Reddit chatter, nor spread such gossiping rumors. That level of indirection ("reddit guy who knows a friend but isn't sure") is worse than "my aunt's neighbor's nephew". Imagine somebody did this about you, that'd suck.

[overeater]

Fair point, can a moderator delete my comment above? I apologize for spreading rumor.