We are really lucky to have a laptop per child, however some of these are old (4-5yrs) and really struggling with the data requirements of online learning. We are one update away from meltdown. We have fortunately got a relative in IT who has streamlined them as much as possible. For everyday school they are fine to write essays etc so reluctant to upgrade for a few weeks, as basic word processors/ Internet reseach/ homework they will probably last a few more years, it is just the live lessons (which I am very grateful for and the children do well in). I imagine though that there is some functionality in Teams and Google Classroom which students do not require even if teachers do. I have suggested that they access teams online but apparently that isn't as good. If Windows would reduce the bloatwear too that would be amazing.
YANBU software companies should offer more low memory slimline programs
YABU plonk your child outside a friend's window so they can watch the online lessons through the window (or similar solutions which don't require changes by software producers).