Honestly I don't think Linux fragmentation is too bad. At this point it is more or less Red hat based vs Debian/Ubuntu distributions, almost everything is based on one of those bases. To solve this Redhat should acquire Canonical and essentially kill Ubuntu. MIR needs to die already. Ubuntu should just exist as a desktop environment as that is the only value it provides. Ubuntu Touch should just be a user Interface for Tizen. Sailfish should also be an interface for Tizen.
The Suse operating system should be acquired from who ever owns it by Redhat.
Accepting the superiority of Redhat and by extension Fedora is the solution to our problems! It would eliminate Desktop and Mobile fragmentation.