I've got a 2017 SV, got it in July with 34,000 miles on it, now has 40,400.
SOH = 75.09% (went up now that it's winter)
SOH (low) = 74.36%
12 QCs (6 of which I think I've put on)
1,154 L1/L2
So without much quick charging at all it's been losing about .45%/month, which would make me think/hope...