Well actually you are, as the announcement of the new version heralds the end of development of the old version. This means that version 5 will soon stop working properly when Apple updates OSx (10.65?) or boot camp which it inevitably will.I don't understand all the posts on here complaining about how often they release paid updates. You seem to be implying that you're somehow being forced or at least pressured into buying the upgrades, but you're not.
That's a good point. Though in practice I think you may be overstating your point. Based on my past history with Parallels, I've skipped buying some versions, and was able to keep using the same Parallels version across multiple OS updates. So I don't think there's any reason to think that the very next OS update will break your current version of Parallels.
If Apple releases a new OS update in the near future which breaks Parallels 5, and Parallels doesn't release a free patch for Parallels 5 users, then I will agree with you that Parallels is treating its customers badly. But as long as they keep supporting previous versions of their software for some reasonable amount of time, then I don't see how they're mistreating anyone by releasing new non-free versions of their software.