Dual licensing is used to maximize compatibility. One requirement is that licenses must be non-exclusive, although they don't have to compatible and as licensee you are free to choose a subset of the licenses when publishing your own work.
With non-exclusive I mean that you don't give up rights to license the work to others under other licenses in any way.
I wondered, if one could actually maximize this, e.g. create some kind of "omni" license that includes all possible non-exclusive licenses at the same time? Something along the lines of:
Omni-license: This work is multi-licensed under all non-exclusive licenses that ever existed or will ever exist. This includes but is not restricted to all past and future variants of GPL, LGPL, BSD, MIT, CC and the Public domain (wherever it exists).
The second part should not be necessary, it's here just for illustration of the idea.
Question is if that would work (maximizing compatibility, not creating other problems on the go)? If not, why not?
I imagine that derivative works could then also be distributed under the Omni-license or could be distributed under any (set of) non-exclusive license(s) and Omni-licensed material would be compatible with all non-exclusive licenses by design.
If it doesn't work, could one at least just compile a really big list of existing non-exclusive licenses and create a multi-license containing them? Something like
Any-license: This work is multi-licensed under GPL-2.0, GPL-3.0, MIT, 3-clause BSD, ...
where one could just link to the texts of the respective license. Or would the full texts need to be included (could probably be done with reasonable effort)?