My flying habits and routes changed last year. I dropped from 300,000+ miles on DL to under 70,000,on the other hand I picked up 65,000 on NW, so I ended the year as Gold on DL and Gold on NW.

Additionally I have had US forced on me and reached Plat with US, but I prefer UA and the Econ Plus, so I also ended up as a 1P/Prem.Exec on UA.

So split on four carriers I ended up with mid-tier and upper-mid-tier status rather than DL Plat/UA 1P (with over 90,000 miles, I should have done two transcons to hit 1K). This is working for me and my travel needs at the moment.