Patek Philippe

Very similar.  

If we had a quartz Nautilus... we could probably match supply with demand... at staggering margins. The dreaded watchmaker is not needed (nearly) and the desperate SS customer gets something that says Patek on it for his golf buddies to glance at... haha... the models WITHOUT the big date aren't really quite so ugly as the one WITH... but yeah, this oozes cynicism... and I think--again--this provides the fulfillment of a MAN'S SS watch that does not require a human as much to make. 

Don't forget the quick change bracelet/strap.

for the simple reason, I am used to the finishing and quality of the AP Royal Oak from the 70s, 90s and 2000s, I like tool watches too, where the finishing is not the raison d'etre. So I did keep that in mind when I went to buy it but couldn't pull the trigger when I had it on my wrist. Maybe if the bezel of the two tone Santos I was interested in was a brushed finish vs. shiny or the quality of the dial would be better could have convinced me. I have noticed on the higher end pieces the finish and quality drastically improves but here is a huge gap in the RP compared to them and the SS/Two Tone models. It does make me a tad bit sad as I really like their designs and history.

I would put a santos' timekeeping way over those APs any day. Also different tiers, but the other way!
Hopefully, AP has corrected this with the new movements out recently.

So I wouldn't know how their newer pieces are doing, I went down the GS/Seiko and AHCI Rabbit Hole after that phase in the journey, I did have friends who bought the newer stuff, when I saw the the 40th Anniversary 15202ST and compared it with my 5402s, A and B serials, the quality of the bracelet, the dial....those craftsmen in the 70s up to the exit of Georges Henri-Meylan were old school and kept it real.

For me it is very clear and obvious that the way and style of production is very different between the pieces made in the 70s upto the 2000s and after 2009. If you compare even the 90s Jubilee pieces or regular 15202 production subsequently with the post 2012 40th Anniversary pieces you will notice the difference, for me out of all of them it's the ref. 5402 which is the best.

Cartier has quick change for strap / bracelet. What does Patek Philippe bring to the table?

Or vice versa

You can see the first link curves differently and there's a much stronger taper on the Cubitus. As for it fitting, it might, but it's definitely not the same bracelet.

When Thierry said he'd cancel the Nautilus, I interpreted that he would cancel the 5711 and come out with a new 5711 replacement, which was the 5811. Could he have meant that? Or did he actually say he was going to cancel the entire Nautilus collection? Because that would make no sense to cancel the whole collection right? Since Nautilus is a popular collection.

In the picture above, the size looks about the same between the 5821 and the 5811. But the 5821 measures 45mm between 10-4 while the Nautilus is 41mm between 10-4. Are my eyes deceiving me or is the Cubitus really much larger than the 5811? I am quite confused by the size.

30m WR which is much inferior to the Nautilus and hard to explain and also round movement in a square case, I thought square movements for square cases were true luxury.