I believe most have stopped upgrading. In the companies I’ve been in most recently, the masses get a laptop for a number of years (2-5), they have parts to replace if one goes bad, but not upgrade. In two years, they’re assigned a new laptop, and so on and so on. Financially, it’s better for a company to have a contract that works like a hardware subscription… they get access to updated hardware on a known schedule and don’t have to deal with the purchasing headache for their tens and hundreds of thousands of computers every few years.
Modifications to the standard are acceptable with an approval for a variance, but those exceptions number more in the 10’s and 100’s than thousands.