The A620I AX is cheaper here than any of the decent B550s were (ie. not the B550M-ITX/ac). Complaining about ITX prices won't bring them down; trends are only going one way.
Baseline for ITX now is 8 layers, which places it firmly on par with last gen premium boards. You can point to any one of many factors (DDR5 signal integrity, PCIe, cooling a small Vcore power plane, denser boards need more layers to fit features, etc.), but there's no going back to dirt cheap 6-layer fare.
You can skimp ever so slightly on VRMs, but VRMs don't regress backwards either.
- A520I was almost a (modernized) carbon copy of B450I Aorus Pro Wifi, but on an 8-layer PCB. It never really got that affordable compared to B550.
- A620I is in a lot of ways similar to B550I AX, maybe only slightly behind on VRM capabilities. Both are 8-layer boards.
Also......B650I Aorus is a 12-layer board now
it wasn't that long ago that we were raving about how the 10-layer Z490I Unify would usher in a new era of OC