Itchy continues to be unstoppable. Awesome!
As for her new choice of bike, I suspect the people she's buying it from are important to her being able to use such an old machine, more important than the model itself.
I know a family, living in an economically depressed area, who have for many years dealt with their transportation needs in a clever way. Each member of the family owns a copy of the same, somewhat obscure, older SUV. The model and year were chosen in part because of low resale value. That model's quirks and issues are now a known quantity to them. When one car is too far gone to be worth keeping running it becomes a donor for the rest of the fleet. Net result? Cheap transportation for the whole family, with most repairs doable at home.
I suspect Itchy Boots is buying her way into a similar scheme. I.E. she isn't just buying a bike, but into a knowledge base and likely even a parts support system that in practice may be as good as OEM parts availability for current bikes. And THAT really doesn't speak well for present day parts supply!
Notice how the sellers had several other XT600's in their shop? They've made a study of that model bike. Also, the younger of the sellers is a trained electrician, per Itchy. And the bike's electricals aren't stock with the starter button where it is. My money is on every bit of its electrical system being well understood by the electrician, and with as many parts as possible replaced with off the shelf items.
When trouble strikes, instead of relying of a dealer network to air mail her what's needed, I suspect she will have the two gentlemen in Germany air mail her the parts. In the present, the time to get critical parts will be the same, except she can actually rely on these guys, unlike the 'just in time' factory parts system as executed by the various OEM's.
There it is, my take on her crazy seeming strategy. Time will maybe show how foolish these comments are...