Indeed, the USB/Thunderbolt controller was the last bastion of Intel chips inside these products that replaced with in-house rolled versions. How well they are

Indeed, the USB/Thunderbolt controller was the last bastion of Intel chips inside these products that replaced with in-house rolled versions. How well they are compliant wise or ability wise, I could not say. That would be a deep-dive testing review I've not seen. Maybe there are some limitations over the Intel offering, maybe not. Though it be interesting how they do compare.