[spacerzasp]

Only because the need to haul anything heavy or large by muscle power is niche. That segment has just been taken by larger combustion or electric engine'd vehicles. Where large loads are commonly hauled with tractors, it's a very common theme to have detachable tools, not tractor per tool.

[CelestialMystic]

Farming isn't comparable and doesn't have the same needs. You already admitted that the use case presented have been largely taken up by other types of vehicles. There isn't really a market for this.

[spacerzasp]

>The need to switch between the examples given is niche

This is what I argue against, that given it's purpose, a need to switch is important. The use case for hauling things has been taken up by other things, but the use case for detachable loads hasn't gone anywhere where loads need to be hauled.

>Farming isn't comparable and doesn't have the same needs

Farming needs wheeled vehicles to transport heavy materials, I think it's exactly comparable.