It's difficult to understand the exponential nature of the network effect without a visual aide, since humans don't intuitively understand exponential functions.

There's too much potential value to be realized by a universal monetary ledger to imagine that some kind of fragmented solution will successfully compete.
Competing blockchains are not "fragmented." They are linked through exchanges, and soon by SuperNet/Blocknet type interconnections.
Your illustration is extremely simplistic. I think you know enough economics to realize that.
If not, please educate yourself on the related concepts of
diseconomies of scale and
negative marginal return.
Because more is different.
