As ususal no talking here please. If you found a package not building against =enchant-2.1.0 please file a new bug and make it block this bug.
enchant-2 is now fully parallel installable with enchant-1.6 in main tree and unmasked. However, we still can use this tracker to get all the consumers to switch over from enchant:0 to enchant:2, so we could remove enchant:0 eventually. This is especially problematic for gspell/gtkspell, where some packages link to enchant:0 themselves, while gspell or gtkspell could be linking to enchant:2 instead (if the versions/revisions that use enchant:2 would be unmasked).