But take Festool. The RAS is no longer produced and NO ONE ELSE has respective product like it on the market. This means "Festool not succeed means I cannot buy the tool at all". So naturally, I would care for that not happening.
I would not care for a mass market product like that - as there is no risk I will no longer be able to buy a casual power drill regardless if Milwaukee went out of business. Most likely I would not be able to buy "CXS analogue" if Festool stopped making it. A fundamentally different scenario.
So I agree with you, but this is also something that varies by country. In the US, you basically have the mass market tools, and then a niche of Festool, and a niche in the niche of Mafell. All the Festool stuff is already hard to get/niche/not available here to start. Tools that were offered, just go away (folks could create a long list), or just were never offered. So with that, buying anything Festool becomes a questionable move, as you don't know when the rug will be pulled out. Like you say, if something goes away, and you just go to another brand, then not a big deal, but here, Festool can be the only brand with a tool of a type out there. Buying anything Festool is a risk. In Europe, there is basically no risk of the tool just going away regionally there, but still be around elsewhere (CMS being the only real strange story). And if a tool goes away, you have such a large install base of Festool stuff, you're not left with a freak tool. And then you have manufactures of similar stuff to Festool, which either don't exist here, or they sell just a tiny portion of their stuff here. Batteries will always make things harder. The good news it the tool is now global verses corded, the bad news is you have a battery system, so tossing it for something else is never fun. For those who use their tools every day (professionals), regular battery/tool replacement might just be normal. But for those who are hobbiest, it becomes a bigger issue. You see in the US where Milwaukee, dewalt have branched out to things like yard tools and everything else one can think of, so folks can maximize battery usage of those systems.