Good Point. People always talk about what a dismal failure the Wii U was....but look at Vita lifetime sales. That thing was an even bigger disaster for Sony..
I do believe the Vita has sold more than the Wii U. If it hasn't, it's close, and since it still does well in Japan and is still nominally in production, it almost certainly will without issue. Of course, at 13 million units or so, that's not saying much.
As for the original posting, here's what I think is the most likely theory for BOTH Sony and Microsoft. Once they're able to cram the ORIGINAL PS4 and Xbox One capabilities (not the Pro, S, or Scorpio) into a Switch-like device, that's when we MAY see something. That's another plus to requiring all future software to be compatible with the original spec. Otherwise, since the consoles are selling just fine, there's no reason to try and launch yet another platform.
EDIT: Decided to write more words on it, although it just rehashes the same point here.
Edited by Bill Loguidice, Thu May 18, 2017 9:08 AM.