Person of Interest - it not only anticipated NSA mass surveillance (with some SciFi elements but anyway) but also ethical questions about AI, the singularity of human intelligence and human nature in general. All while being a well told crime show with comedic and heartwarming moments.

In a few years there will be something called Bitcoins, buy them, like a lot. Double what you think of and sell them 2021.

LawnChair, it’s open source, customizable and has drawer folders

Lemmy existed for longer so it had a bigger (dev) community, is more mature and had more and wider 3rd party app support.

No, Syncthing isn’t a self hosted cloud but a real p2p transfer tool.
There are discovery servers enabling devices to find each other but files are rarely transferred through them.