I like to cut things close but I would not do that these days. Usually they come up pretty quick but sometimes it can take 10 minutes. And if you're already 10 minutes late for any reason (not uncommon with CR7s) then you are hosed.

The connection is much safer for a checked bag, they know how to get those bags loaded and the bags don't have a T-10 door close time like self-loading cargo does.

I've had to run to make two connections recently (both at PHL, both were 45 minutes, but from regional in terminal F to mainline in terminal B) and I 100% would not have made them if I had to wait on valet bags. For one of the flights, 9 other pax had the same connection but we were the only ones who made the flight (we ran, got on the shuttle right as it left F, and got to the gate right at T-10).