That's only 15% down, I'm not surprised that they're dragging their feet still on a replacement. Wish you luck on wearing them down. How much time do you have left on your warranty? Still about 4 - 5 years, right (IIRC 90D but not a facelift)?
If you manage to convince them that'll take some weight off my mind. I know it's a different gen of tech, but your total miles are just past where my warranty runs out. If I still have better than 85% original capacity when I hit that mark I'll be happy, I expect SC distribution to be even denser by then. If it drops to that point or lower and I'd be able to get warranty that'd be awesome. Win-win.
"only" 15% loss but back when I was a new owner I was under the impression they were replacing them at ~12-13% but that would have been the 60, 75, 85, as the D models weren't old enough or high enough miles at that time. That wasn't an exact value from Tesla Tech but thought I saw on the Forum that it happened around that level.
No worries, it keeps dropping steadily so I don't have much faith that it will plateau and level off anytime soon. I'm at 133,000 miles after 37 months for my 90D pre-facelift (Jan 2016 build). Essentially, it is a 10-1/2 yr old car in "Tesla years" as they estimate 12,500 miles per year for typical use. I have the 90D v1 battery pack (discussion in another thread) and the v2 and v3 battery pack 90D do not have the "capped at 95 kW charging" that I do which is a big issue as I can't even get close to the old 118 kW that I used to. Losing range is one thing but losing supercharging speed when hitting as many as I do really adds salt to the wound.