wrote:
But the no 1 limitation is that the bits screw into place, they're
threaded. So there appears to be zero hope of it lasting decades.

I think somebody said they have an M5 thread, and M5 is a common kind
of bit:
https://www.ebay.co.uk/itm/M5-Shank-.../382418750884?

You would need to thread them yourself, though.

Theo