It has been mentioned in a few places, that in the 8-bit era, schools preferred computers with a bulky all-in-one form factor, in the hope of reducing damage and theft, to the point where they preferred e.g. the Apple II and BBC Micro to the Vic-20 and C64, but considered still better the PET and TRS-80 3/4.

But after that era, schools ended up using PCs in desktop (not all in one) or laptop (the whole unit is quite small and light) form factors. If schools still had a strong preference for all-in-one, I would expect some company to manufacture PCs in that form factor to capture that market.

Was there a point at which they stopped caring? If so, when and why?