I'm a UA Million Miler - but now retired. Actually about 1.5 MM miles on US metal alone.
I fly international about 2 times a year these days and domestic another 2 times.

Unfortunately I will have checked baggage. I can go for a week or two in a carryon, but this trip is with my wife and needless to say she carries more than I do.
We are both Global Entry but waiting for the luggage kills anything quick.