I think the analogy is akin to hotrodding. Some third party modifications may make their way back to the original manufacturer, but there is always a desire/need among enthusiasts for more outlandish proposals that may not align with the vision of the original maker. Particularly when they involve subjective aesthetic details. If anything, the open-source ecosystem has shown itself to be robust to fragmentation, with 19,000 ways of solving the same problem that are generally interoperable with each other, so I don't think it's a bad thing per se, but rather a strength.