Individual cars can see lots of degradation or very little. At 3 years and 21K miles I've seen about a 1/2 mile drop in range at 90% (269 when new, but would drop to 268 within a short time after finishing charging and consistently 268 in good weather now). 5% in the first year then leveling out is about the average, but some have more and some have less.
For those who don't know many people see a drop overnight for anything ranging from a day or two to a week after the 2019.16.x update. The car also has pumps and fans running all night sometimes during this process. Tesla is running some kind of test on the batteries and the speculation is that it has something to do with the fire in Hong Kong.
I saw the drop for 2 days, but some people have reported it going on for several days. It probably depends on what the diagnostic finds and what it's doing about it.