The point is the stall, getting stuck in the same arch for too long is never good and this is getting closer to the 4C stall every month and that is bad.As mentioned many times, AMD is now in the high volume mainstream laptop market, where gaming laptops has seperate GPU, and laptops without seperate GPU are mainly sold to people that doesn't care much about having best possible integrated GPU performance.
Of course they will loose some sales to Tigerlake due to keeping Vega but they will gain much more thanks to the big momentum that have achieved with Renoir. OEM are taking AMD seriously in laptop now since the customers are "screaming" for more Renoir laptops.
So having a well balanced laptop APU for most of the middle and high-end market that is delivered on time and with competitive cost (not too big GPU-part...) is what AMD focus on.
Cezanne will be a big success thanks to the CPU performance.
Memory bandwidth is too low for real gaming APU's anyway.
And really dont think Cezanne will be a balanced APU, maybe Renoir is now, specially 6C one, but unless they increase the IGP size, Cezanne will have too much CPU and too little GPU, and i think there is a higher chance that they will make it smaller to keep a die size similar to Renoir. At any rate the Vega will be too old for Cezanne.
And there is something called ATX power supply, whats your point?You should look into this technology called pci it really is quite amazing.