Metroidvania is cringe, but I'm literally playing Celeste right now, having just finished Tactics Ogre, and then I'm gonna play Fata Morgana. I agree, but if that's your bag then you don't need to consider any of this. A GTX 1050Ti will suffice for that, the point of stressing about big games running is future proofing. The last AAA game I bought was Doom Eternal, so I'm not that fussed, was only curious about APUs as a console alternative.

Yeah Bethesda's last good game was before the 2008 recession, I would laugh if TES6 got canned. Skyrim was fuuuckin shiiit!

Infinity Fabric is the name for the interconnect between CCXs in all Ryzen CPUs... I've never been clear on how memory sharing works in consoles 'cause Idek, I tend to view it the same as all iGPUs do it, that you just allocate however much (2GB, 4GB) memory to GPU and the rest to the CPU.

I would be hesitant of getting hyped for any memory sharing stuff AMD talks about--back when they were still doing Modules with shared elements in Bulldozer and Piledriver architectures, their APU line featured a bit of this functionality with the Mantle API - Heterogenous System Architecture, or HSA for short. AMD talked a lot of shit about how cool it was for the processor and graphics parts of the APU to access the same memory, and how cool it was that they would be treated "equally" computationally. They dropped this idea hardcore when Ryzen launched because it was basically a GPU-shaped crutch for their garbage CPUs, and the marketing talk was all cope, lol