Maybe. Though this reminds me of people trying to design a horseless carriage:

It's totally doable with modern technology, but in all honesty, modern cars work better.

(Off-topic: now that I think about it, it would be fun to see a 'self-driving carriage'. Ie you keep the horses, but replace the coachman with technology.)

FWIW, conveyor (or just any other static logistical mover) vs independently driving robots (or even crewed systems) is a valid spectrum that you apply in both internal factory logistics (from workers driving, through automatic robots, to conveyors and internal trains) and nation-wide systems (lorry vs. train, pretty much)

Yes, it's a valid spectrum. Definitely!

About your other example: I would expect self-driving lorries in a few decades to look very different from current human-driven lorries.