EAGLE/Altium is kind of the cheapest level for connecting a CPU to RAM with length matching. So as soon as you're an ambitious hobbyist, you'll need something comparable.

For example, Chinese hardware startups selling through aliexpress tend to use Altium. But I don't think they'll buy many licenses. And I can't afford to. I really have no idea who would buy it, except for people who have old Altium files that they absolutely need to open.