I'm not entirely clear why/how this is an open source issue?

My assertion: Inertia of user base is by far the largest predictor of what will stick in a market. If you can create a critical mass of users, then you will get a more uniform set of solutions.

For fun, look into bicycles and how standardized (or, increasingly not) they are. Is there a solid technical reason for multiple ways to make shoes that connect to pedals? Why are there several ways to shift from your handlebars? With the popularity of disk brakes, why don't we have a standard size for pads?

I think there are a lot of things that we tell ourselves won from some sort of technical reasoning. The more you learn of things, the less this seems true, though.

Not, btw, that there aren't some things that die due to technical progress.