2015 MacBook Pro warping real BAD!
The lower case has slowly been warping for 3 years or more. The front feet aren't even close to touching the desktop. Recently it has gone crazy and is warped so bad that the cover won't close tightly. There is a quarter of an inch gap! I never leave home with the MacBook. It still has the original battery which retains a full charge. I intentionally partially discharge the battery twice a month to extend its life expectancy.
MacBook Pro 15″, macOS 11.2