From what Ive seen in arguments about this, Plex generally is more accessible with QoL and easier to understand interface for non-techie people to share with family/friends. Something thats hard for nerdy people to understand is that average people are perfectly fine paying for digital goods and services. An older well off normie has far more money than sense and will happily pay premiums just to not have to rub two braincells together with setup or for a nicer quality of experience. If you figure out how to make a very useful plug-an-play service that works without the end user of average intelligence/domain knowledge stressing about how to set up, maintain, and navigate confusing layouts, you've created digital gold.
This isn't the fault of open source services you can only expect so much polish from non-profit voulenteer. Its just the nature of consumer laziness/expectation for professional product standards and the path/product of least resistance.

The installed appification of everything riddled with trackers when a web browser + site will do. Dead simple minimalistic UI that a toddler can figure out how to use. Every product is designed to account for the lowest common denominators of human intelligence which encourages 'cant, wont, dont know how' brain rot instead of making the tech illiterate feel pressured to actually apply themselves to learn. Now we have entire generations of idiots who feel entitled to the pleasant convince of advanced technology but unwilling to understand whats actually going on under the hood or accept responsibility to learn how to use it properly/ethically.
A society built entirely on dead simple convinence and instant gratification is one that fosters the destruction of individual critical thinking skills and mental robustness to troubleshoot/adapt when encountering a problem.
So many people are proud of it, thats the worst part for me. Legitately bragging about making it through life with the bare minimum of braincell rubbing. As if just being an unthinking half-sentient ape with a learned helplessness complex is an ideal state of being worthy of pride.