My recent experience with a laptop with liquid damage is a good example of proper support.
I needed a HP Elitebook replacement keyboard, with a relatively rare Swedish/Finnish keyboard layout.
All I needed to do was to go to HP spare parts store, and order a new one. Sure, the price is a bit steep, but not extortionate.
It was shipped the same day, and if UPS had done their job, I'd had had it the next day.
The answer to any kind of private customer support issues is not to deny service (again, because that can very well be illegal in EU), but to set such prices that it makes commercial sense. Large companies like HP –– and I do see the hilarity in this! –– have done this for decades.
This stunt by Keysight and others is a stupid one, and no inane attempt at claiming how it protects their brand or business can defend that, because other companies do not suffer by doing what Keysight claims would make them suffer –– that is, selling pro gear to private customers. No, it is just the kind of idiocy that spelled the doom for Nokia in the cellphone business. Poor business strategy.
Even if Keysight can weather this without major ramifications, the fact that this kind of inanity is what their leadership advocates, indicates that it is not a company that anyone who can get their hardware from a more sanely lead business should support if they expect their gear to be maintainable over more than just the immediate short term.
I have seen before how companies throw money at PR and "outreach programs" –– think Keysight Wave ––, and think that garnering market share that way means they can shaft their customers. Thing is, it does not work that way. Yes, the students using your test gear at vocational schools and universities might buy one device with their own money afterwards, until shafted the first time. People who buy expensive gear to do their work are extremely good at learning from being burned by a vendor!