I don't foresee any future purchases to replace my Dremels when they die.
Do Dremels die?
I thought it was a once in a lifetime purchase. I've never known anyone that killed a Dremel. If mine did die, I'd have to replace it. There are too many things that it is just perfect for.
Indeed they do. About six months or so ago, the sound my Dremel makes made a distinct change. Without taking it apart and without remembering where the hell I put my parts diagram, my best guess is there's a bearing that's about ready to give out. In any case, I wanted to buy a few extra parts and Dremel doesn't even sell them for my model anymore. IIRC, I believe they still sell the brushings, so there's that.

I also have a Dremel sander (like the one
featured here). Just about any disc can be applied, but the sanding belts and the drive belts can't be found anymore. This was an amazingly useful tool, especially for removing small bits of material after rough cutting parts. I still have extra sanding belts, but the last drive belt disintegrated and I have no idea what it looks like. I can replace the entire tool, but it won't be from Dremel.
I also have a scroll station (My GF's actually). It's only about five or ten years old so it still functions just fine. If and when it dies, I'll bet money that'll be the end of that tool.
The Dremel and Sander are so old, they're not even featured as a retired product on their website. The Scroll Station is however.
When Dremel was sold to Bosch, Dremel pretty much killed their entire line and "started over" with new products. I guess the availability of parts is dependent on how many they still had in their warehouse?

So yeah, at this point, I find I'm using my dremel less and less and using some of my father's old ass
death dealing power tools more. When my Dremel dies, I don't know if it would be worth it to reinvest in a Dremel again.