To upgrade the UEFI or other hardware-level firmware you need a way to upgrade. Best OEMs use LFVS; good OEMs use have ISOs or bin files you can flash from UEFI; terrible OEMs lock that into a Windows-only executable.
In my case there was a fan & thermal update I was never able to get.
I had one with fresh minced mint + basil along with diced bittersweet chocolate & it went so beyond the average enjoyment of mint chocolate.