Have been in and out of 1K for years, and have been a MM for a number of years too.

This year 1K > (Lifetime) Gold

Would have got Plat but 1250-mile flight on LH was disallowed because it was operated by Air Malta
Would have been exempt from PQD because spent more than $35 on a Chase United card last year.

Have 50K flying with UA booked between now and the end of March, but not a lot thereafter — or not yet. Have been looking at changing to AA for sometime. Only reason I didn't this time was because SO needs guaranteed upgrades for her legs (veins kaput), but she is not going to fly much in future so may look at it again, or stick with it until I make 2MM (but with the changes to the program I estimate that my miles earning rate will decrease by 60% after March 1 unless I start buying more expensive tickets).