They are still about, there is a drive through KFC just up the road from me.
Walked there and tried it about a year or two ago (not just drive in, you can go inside) for nostalgia's sake. Seem to recall the coating tasted nice and wanted to retry it once more.
Found it confusing inside, more like one of those burger places, with menus up and not easy to understand what was on offer. I ended up just choosing something more or less at random as I couldn't really work out how to simply get a few chicken pieces.
Was not overly impressed. It was, ok, I suppose but not the flavour delight I thought I recalled from my youth. Not been tempted to have a return visit. Maybe one day.