Seems to me, the idea is to take your legacy product, and price it *up* to drive sales away, while offering newer or better-supported offerings.
A preferable alternative might be to price it *down* into irrelevance, reduce or fully cut support (you're on your own, besides user forums), and perhaps release some of the source ("it's your problem now"). Not that that's an option for most of these big, old, lumbering companies, who greedily hoard their crappy code and try to wring every thin cent they can out of it (but it's "IP"!!).
So, sigh I guess...
Tim