Interesting. Now that I think about it a tldr could be "Use segmentation for UX" ;)
(segmentation = groups = clustering)
I was thinking a bit further on this last night, and thought why not use evolutionary methods as well?
In other words we don't design the UX, we let it emerge and cluster around segments naturally. Kind of like if you took the concepts from genetic programming and mixed it with UX.
The challenge is finding a way to clearly segment your user groups that doesn't have the same flaw of grouping based on majority otherwise the benefits will just be averaged out.
For example, if I can figure out that the chance of someone belonging to user group A when arriving from source X is 70% then I'm still serving a potentially unoptimized UX to 30% of the users.
Obviously this isn't a problem for an app that can clearly segment its users!