That has been the way of how things were done in hardware from the start I'd say, just look at any moderately complex PCB - you can see each IC as a "microservice" of sorts, even analog function groups (oscillators, bandpasses, filters, ...) made out of discrete components can be considered "microservices" of sorts IMHO.

All this is is moving the definition scope of an individual "service" from the IC to the chiplet level.

basically yes :)

chiplets seems the hot new thing, with an important difference - it's not just a fad: a lot of investments and production plans are moving in this direction. Expensive stuff. So IT HAS to work. Failure would be very expensive. But it's still totally possible.

imagine your services crashed at runtime 5% of the time due to cosmic rays.

actual number in hardware is a closely guarded secret, at least for the most recent process, but the high level solution is the same... build smaller boxes so the whole system can handle one of them failing gracefully.