Thanks for your insight!
You are right, I doubt we'll get some kind of official statement on this, but the combined experiences sound pretty convincing ... too bad, I really like those strings.
My problem is this: I recently got a new guitar with pleked non-SS frets and the setup feels amazing. Naturally, I would really prefer preserving this state as long as possible. Since you seem to have some experience with these fretwear problems: could you suggest an alternative string that is protected against sweaty hands like mine, but is easier on the frets?
I really wish I could suggest the solution, but I don't have it. Mostly it's not the wrapped strings that are affected, but the plain strings go black, rough and even rusty very fast. So coated strings, where only the wound strings are protected are not worth the money, if you have to change them quickley - because of the plains react to sweat as bad as before. If the treatment of the plains works (anti-rust plated...), it seems they cause more fretwear.
As said, it COULD be (should be ), that polymer coated plain strings are nicer to the frets - but there are not many in the market (coated ghs boomers, DR Black Beauties...?). Reviews on these strings are mixed and they seem to be not as durable as Elixir strings. If anyone has experience here, please tell us!!
It is a question of costs for me too. What I do at the moment: Buying cheaper strings I like (Fender...) in multi-packs and online, using Kyser string cleaner - and wash my hands with ph-level neutral 5,5 soap before playing.
And I accept ordinary fretwear. Don't panic - on perfect new frets slight wear can already look pretty bad, but it usually looks much worse than it actually is!!