It’s likely they’re purchasing 1-2 year old devices then. The AUE starts ticking the second the first unit gets made available for sale. The district I worked had over half of its 12 schools as Title 1, and we held on to every device to the point that they expired over the summer or were replaced summer prior if they were going to expire during the school year.
Don’t let ChromeOS and it’s penchant for WebApps fool you. It took Google months to patch the firmware shims, and it’s not like they had any suggestion other than “You can tell it’s Shimmed by the enrollment date” “Just configure a report to spit out enrollment dates after X/Y/Z to locate Shimmed devices”. Never mind the fact that every new board meant a new enrollment date so we had to physically keep tabs on what potential repairs were being done.
I hate Chromebooks, btw.