Most of those are also Chase partners.

Bonuses are nice if one happens to come up when you need to make a redemption. Usually they are useless.

The CSR is still the only card that gives 3x pts on general travel expenses, and now 10x on Lyft. I love 5x MR on airfare, but I also want bonus pts on the rest of my travel expenses. Ground transportation and accommodations add up to more than the airfare for most of the trips that I take.

Again, it's not a competition. I don't need to choose. Both cards provide huge value to me; why would I get rid of either one? Amex Plat pays for itself with IAP; the rest is just gravy. CSR pays for itself with the travel credit + 10x pts on Lyft; again, everything else is gravy. Chase Hyatt is a no-brainer for me with the amount that I stay at Hyatt.

I'm going to NY next weekend. Airfare was cheap (~$240 round trip). So of course I'm happy to earn 1200 MR with that. But also I will pay about $150-$170 for 4 airport lyft rides, so I'm happy to get 1500-1700 UR for that. And my hotel stay (at a Hyatt) is about $300 for 2 nights (NY is so cheap this time of year...). So that's another 1200 Hyatt pts.

This is all spend that I would be making anyway; I'm not choosing a vendor specifically because of a partnership. Why would I get rid of any of these cards?