Ignoramus18798 wrote:
The bad thing about hosting a separate wiki, as you note, is that if
the host loses interest, dies or runs out of money, it would go down.

The good thing about it is that we can discuss topics that would
likely be removed by wikipedia community as too specialized, such as
fine points of metalworking.

That is a very good point. In my experience the Wikipedia community can
be excessively eager to remove articles which are accurate and useful,
but don't conform to their criteria for encyclopedia content. They are
quite pedantic.

Good luck if you decide to proceed with the plan!

Chris