I few out of SFO to MEX on 10/23 and MEX to SFO on 10/28. I was in paid Premiere. (I was there for the Grand Pix. Smooth Operator special delivery.)
At SFO I asked if they were going to weigh my carryons and they laughed and said "No, you're in first class." At MEX they didn't try and I didn't suggest it. Didn't get tagged either. 🤷♂️