He almost got there in the end, but he stopped short. The plough will break. Then what? Do you know how to make charcoal and how to make a forge? What about replace the steel that's rusting around you?

Beyond the technology traps, we're in a "society trap", we need each other and the skills each other has. The trouble for the fictional scenario is not the technology, it's the lack of a community to pool knowledge. The little old lady who loves her garden and knows what plants are what, even some of the exotic ones typically imported, the fitter and turner who might not know how to exactly use a forge but understand metallurgy enough to shape it sensibly, the farmer who knows what the plants and animals need even if they don't have on hand the tools they normally use.

I for one don't want to end up by myself, I quite like all the benefits society and specialisation bring. In no part of history or prehistory I know of (not a lot, granted) has much of society known enough to survive alone without at least some sensible community.