I rather like the idea of what small ITX Powercolor 5600 XT. Hard to beat at 180mm, near the top of TPU's perf/watt chart, quiet, and performs between a RTX 2600 and RX5700.
Price might not be that great, so not high enough volume to take much marketshare.
The 5500 and 590 situation is stranger.
Can't help think that the Polaris port to 12nm was mismanaged. Why bother to port it and then overvolt and clock it so high and keep volumes low?
Clocked down to the speed of a 580, the 12nm version should have a pretty good uplift like Ryzen 1000 vs Ryzen 2000. Okay, so wouldn't command the same price but GF's 12nm must have been cheap by then.
Certainly the chasing of margins, aka the "we don't want to be known as the cheap brand" hasn't worked well.
Kind of ironic, AMD have the vast majority of consoles (Switch has some volume but do any developers even take it seriously), but almost no PC marketshare. And of course, while the console margins are low they have great volume. Since taping out costs a lot these days, it doesn't make sense to keep Navi expensive unless wafers are short.