I'm just trying to figure out what airlines(well, and/or hotels) give lifetime rewards at the highest level, since that's commonly by far more lucrative than others, and I'm realizing that not many do?

Doesn't offer Lifetime highest-level:

AA (Only Plat, not Exec Plat)
AS (Only Gold, not Gold 75k)
Delta (only up to Plat, no Diamond)
M&M (? Not sure, I couldn't find it when searching)
Flying Blue (?)
Asia Miles (?)

Offers Lifetime highest-level:
Asiana (500k (!) for Lifetime Diamond Plus, which essentially has the same benefits as Platinum, which can be had for 1MM for Lifetime. All Asiana+*A flights count, or 500 Asiana segments)
AC (3MM for SE+Elite for companion, but AC-flights only, no codeshares/partners)
UA (starting at 3MM for 1k prem, includes companion)
BA (35'000 TP, vs. 1'500 for Gold - 23x, while most other airlines have 10x, so that's mor like 2.3MM for comparison's sake)


which important FFP's am I missing, and is the info above correct? Or am I missing some ways to get e.g. Lifetime AA Exec Plat/AS Lifetime Gold 75k?

Cheers!