This year I am borderline being able to hit Diamond on SkyMiles - I get high volume of miles, not segments, due to fewer but long trips.

I am moving permanently from LAX -> SFO, and SkyMiles is a lot less useful to me there. So, I'm debating what I should be doing as i book my next trip:

- Continue in 2021 on SkyMiles - Book on Delta, probably hit Diamond by end of year
OR
- Switch now do status match on United, hit Premier Platinum by end of year.

Then - next year, status match on United? The perks of Diamond on Delta are obvs a lot less useful in SFO.