@Dayglochainsaw That doesn’t currently exist. However, nothing technically prevents it. In fact, in the ’90s there was a line of PowerBooks that provided full data lines from the logic board to a slide-in dock. In this case it didn’t *replace* the CPU, but it did add a floating point unit, video cards, and arbitrary expansion cards.
This is where Vy-let participates in the Mastodon fediverse.