I follow him on LinkedIn: he works on the things that will come in 10 years, not on the products that Meta ships in 1-2 years. LeCunn is going to be there for some time.

Yann LeCun is 65. It is extremely unlikely his future research contributions will amount to anything close to what he has already done.

No - he's head of FAIR which is still there. The new "reorg" isn't really much of a reorg, with the four AI groups now being:

TBD (LLMs / "super-intelligence")

FAIR (LeCun - JEPA and other long-term research)

Productization

Infrastructure