The only problem with that is that it won't be able to reliably carry Thunderbolt 4 speeds. Most of those connectors are "USB-C" which is achievable, but I haven't seen any (verified) Thunderbolt 3 magnetic connectors, even.

That's important for Pro Display XDR users, or Thunderbolt dock users, who only use one cable to plug their Macbook in (power+thunderbolt).

Or, screw it, we end up with a charging only breakway USB-C port.