Repair or replace?
From an environmental perspective its always a good idea to repair and so reuse anything. An organization may think differently. Local labor costs for repair technicians now run $120 an hour (this isn't what the person earns, of course, but what a business charges to cover wages, overhead, depreciation and profit) so repairing a unit may not be cost effective. Even if a unit is repairable it is likely that the repair will include a major subsystem replacement which for something like a Chromebook is effectively putting new internals in an old case. We see this not just with computers and other electronic devices -- these days when you do fix something its replacing a module rather than a component because even if it was cost effective to replace a component replacing it could compromise the integrity of the module through heat or damage to a conformal coating.
Electronics isn't what it used to be. I have old equipment which like a vintage vehicle can be dismantled and rebuilt part by part as necessary (although vacuum tubes -- valves -- are complex, precision, parts that aren't "user serviceable") but modern equipment is really single use (I'm not going to try to repair a RaspberryPi Zero, for example). Manufacturers are aware of this so while there's no excuse for deliberately making things that are known to degrade like batteries and connectors unrepairable the bulk of a unit is definitely single use only.