

Take HomeAssistant for example: you’re free to use it self-hosted, but as soon as you want to expose it securely through the Internet, there’s need for infrastructure that has costs, both in materials and labor. In HomeAssistant’s case, it’s NabuCasa that does it, and costs money, and helps fund the work of HomeAssistant’s developers.
Having things free (libre) and open source is a blessing, but we have become used, entitled, even spoiled, to enjoy the work of very specialized people for free. That’s not always feasible.
Another example, Zabbix, is totally open source and free, they only charge for support and training if you ask for them. It has worked for them for many years, but if they start to struggle with funding, I’d understand if they charged for it.
Plex is more polished, but I love Jellyfin’s subtitle search; it blows Plex’s socks away.
Also, Jellyfin doesn’t nag me every effing time to enable DRM in Firefox for some unfathomable reason.
But Plex definitely wins on performance, IMO.