[fastball]

Ownership (and adjacently right-to-repair) and upgradeability are two separate problems, let's not conflate them.

[jeffbee]

This rig has two PCI Express ports right on the back. Upgradability seems OK.

[Hamuko]

AFAIK, the ARM Macs have no eGPU support.

[lights0123]

That's covered in the article. It's a lack of AMD ARM drivers.

[Hamuko]

That's not really conclusively proven at the moment.