Mozilla Foundation releases much (most? all?) of their software under a tri-licensing scheme MPL/GPL/LGPL.
With the compatibility clauses in MPL-2.0 (mostly section 3.3), is that still useful?
There's a difference between the two situations, but it might be unimportant:
With the tri-license, Firefox uses all three MPL/GPL/LGPL licences, so I can download Firefox and I immediately have the option of distributing it under the GPL.
If some software was released under *just* MPL-2.0, it seems I'd have to write some GPL'd code, merge my code with the MPL-2.0 code, and *then* I'd have the option of distributing the combination under GPL.
So, does MPL-2.0 aim to make the tri-license situation unnecessary (and phase-out-able)? Or is it still worthwhile keeping the "immediate-GPL" option?