I'm not an AMD user, so trying to catch up here...
Are you saying that AMD MoBo's have on-board video but the CPUs never supported them?
Is that to say up until now every AMD MoBo required a separate video card in order to use it?
The AM4 motherboards never had on-board video. They have video outputs for processors with built-in graphics. What Leon was implying was that there weren't any AM4 chips with graphics that could utilize these outputs, but he's wrong. Bristol Ridge APUs have been out for quite a while for OEMs, and for a little while now for consumers. Those APUs had integrated graphics and thus utilized the boards video outputs.
They're easy to overlook though in the DIYer market... even more so now that Ryzen G is being rolled out.