I do have to say I've admired the series more than I've loved it. The action is obviously spectacular but the longer the series goes on the more I feel it verging on being exhausting.
I thought they'd be stretching the simple premise when they were making a third film, then I liked Parabellum quite a bit, despite that it didn't really accomplish a lot to bring John Wick's story forward after the cliffhanger at the end of 2. Then I really thought they were stretching it making a fourth so when I heard that it was almost 3 hours long I was sure I was gonna give up.
Obviously the plotting is spinning wheels like a motherfucker to keep things happening ("go here to do this but to do that you first have to do this"), but god damn the action rules lol. Donnie Yen stole the show and by getting fight scenes from more POVs than merely John Wick, the extended runtime never felt exhausting.
The dialogue scenes explaining lore stuff is a bit snoresville, but they do a good job of putting in visual elements to make the visuals more interesting. But come on now, the final hour is an attempt to top everything this film, and the previous entries, have achieved and the result is a textbook example of the intense adrenaline rush other action films can only dream of.
I dunno if they'll choose to go out with the flag on top or if they'll risk it with another movie, but if they decide to stop spinning the wheel here then this would be a really satisfying finale.