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.

The issue of the wiki page depending on one person can be mitigated by
publishing the wiki database snapshot, this way it can be reproduced
elsewhere with a minimum of damage.

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