I saw that one study about people who fast charge 90% of the time had almost no difference in degradation than those that did 10% fast charging. Does that line up with what you've read?
Tests in research do not show the same thing. Fast charging degrades the battery faster. In these tests, the mostly do not heat the batteries before the charging session.
There are a few things to consider:
-Preconditioning the battery reduces lithium plating which is the main issue with fast charging.
-Periods of slow charging and smaller cycles can actually restore capacity in a battery. Some part of the lithium plating can be reverted to cyclable lithium by slow charging ( = AC-charging).
So supercharging every now and then but not all the time might make the extra degradation from supercharging almost negligible.
-Constantly supercharging would eventually cause shorts in the cells, causing them to die. You probably need to do much supercharging specially if you always use preconditioning. But if you do it often enough and enough times, it will happen after (probably) quite lobg time.
I have free supercharging on the new car and there are so many more superchargers than before (and car charges incredibly quick compared to 2012 version) so might take advantage of it more.
I have 3 yrs of free SuC on my MSP. I still only use it as with the last Tesla I had = when needed and on a longer trip. I do not use it at home to save money.
I'm still stopping charging at 55% so my stops are only about 5-8 minutes which is amazing. I can't believe how quick it is. 27-55% in 8 minutes.
If you are to drive after the charge, there is not really a reason to stop at 55%.
(Well, it is not bad to stop at 55%, but the real reduction in calendar aging comes from the time above 55%, so you can charge higher and if you still park at or below 55%, youre fine.
I charged my Plaid to 100% today for about the 10th time since I got it 7 months ago.
Still very low degradation due to it mostly being parked at 55% or below. (I arrived at 40%, and just was on a shorter drive so no it is parked at ~ 37% or so.)
No danger to use 100%