You know that's not how people are filling their servers, right? Plex is a way to manage and stream your pirated media collection, though Plex will never admit that.

I don't know what the difference is between downloading and sharing libraries, but check out Soulseek. It's a little file-sharing program that lets others download directly from your music folder and vice versa. When I couldn't find an album on any torrent tracker, some hero on Soulseek had it. The main drawback compared to torrents is that you're limited to the upload speed of this one person, you can't connect to a dozen people with the same files and combine their power.

"To add one additional tooth" ("einen Zahn zulegen"), meaning to hurry, to do something faster.

Related to the teeth of gears, I assume?

And with "this decade" you mean within the last 10 years or since 2020? Either way, I'm scared... Just kidding, if this is a bank we're talking about, they're actually ahead of the curve.