Kiran Kedlaya finished the proof of Deligne's conjecture (1.2.10) made in La conjecture de Weil, II, which is definitely "noteworthy", and perhaps "not so famous" compared to the original Weil conjectures.

https://www.math.rutgers.edu/news-events/list-all-events/icalrepeat.detail/2019/02/06/10062/-/companions-in-etale-cohomology

http://kskedlaya.org/galc.shtml

Kiran Kedlaya finished the proof of Deligne's conjecture (1.2.10) made in La conjecture de Weil, II, which is definitely "noteworthy", and perhaps "not so famous" compared to the original Weil conjectures.

Colloquium talk: Companions in etale cohomology.

Annotated reading list for the working seminar at the IAS on the proof.