I don't think that quite applies. Technical debt comes from making choices that help you in the short term but cost you more in the long run (i.e. you're paying

I don't think that quite applies. Technical debt comes from making choices that help you in the short term but cost you more in the long run (i.e. you're paying interest). Needing to move off a deprecated tech stack wouldn't really qualify unless there was a longer-term option available at the time you originally decided on your tech stack.