I don't know if that contradicts what I said. If your upgrade strategy is "never," then no matter what the long-term support window is, you're going to go over

I don't know if that contradicts what I said. If your upgrade strategy is "never," then no matter what the long-term support window is, you're going to go over it. If it's "only when I have to," making one obvious marker for when one might "have" to sooner rather than later keeps some people from falling so far behind that "to move up to the newest version would be equivalent to a full re-write."