Rewatched all Mission Impossible films including Final Reckoning, and Mi3 is still my favorite.
Unpopular opinion, but it's the most emotionally grounded one, with very personal stakes, not just world-ending.
Also the action is over the top but remains mostly believable.

Final Reckoning has some of the best action in the series, and Cruise is on top form. Had a lot of fun watching it.
But (SPOILERISH) it gets too self-referential and cliché for me. The whole “Ethan was always right and heroic” angle feels quite forced to me.