I use a reverse proxy for Jellyfin remote access, people saying you need a VPN or Tailscale (which is also a VPN) are unnecessarily paranoid IMO. That said, I'm a software engineer with more than 10 years of experience and a lifelong tinkerer, and I've set up an OpenWRT One as my primary router, so my firewall is more up to date and useful than 99% of consumers and I'm comfortable restoring a PC if it gets hacked.
But maybe more importantly IMO, Jellyfin doesn't have a central server that would serve as a high-priority target for hackers. Plex may have funding and full-time devs, but they're also relying on security through obscurity, which is hardly best-practice. Their central servers were hacked 10 months ago and passwords were leaked. For that to happen to me, hackers would have to be interested in my little Intel N100-powered server running from my house with maybe 10 daily active users. On top of that, Jellyfin's team have generally been quite fast at addressing all known high severity vulnerabilities because the project is open source. Everyone can see the code, so anyone can fix an exploit as soon as it's found.
As far as sharing access with my friends, I just ask them to put in the username/password they'd like on my phone in person for account creation, then I text them all the details about the URL for my Jellyfin instance, how to set up their smart TV app for it, etc.
I can access my Jellyfin instance from almost any smart TV in the world with the official apps because I followed their official guide and set up with a reverse proxy instead of Tailscale.
I've always struggled with writing by hand primarily because I tend to over-tense my grip on a pencil/pen even with an ergonomic grip attached. I learned to touch type pretty early on, so back in school before they let us bring laptops to class I would sometimes "type" notes and imagine the text of them in my head as I typed. This still helped with my retention compared to just listening and making mental connections between the concepts being introduced. Sometimes I would type out the full detailed notes and then by hand write out tiny personal shorthand bullet points that would help me recall the general point.
To this day, if I'm trying to learn something new, I will sometimes "type" on an invisible keyboard if I don't have a pen/paper or a smartphone I can write down specifics on. It doesn't work as well for things like memorizing phone numbers or like support ticket ID numbers, but I've found it helps me ingest knowledge even if it doesn't help as much with raw information the way writing by hand does.
Now all of that said, I have also found, like Neal Stephenson, that a high quality, low friction pen on notebook paper tends to feel the best and produce the least cramping. To this day, when I absolutely need to take handwritten notes, I use a Sharpie Rollerball 0.5 black pen with a small notebook, primarily for D&D (and other TTRPG) prep-work, so that I can recall specifics off the top of my head better while improvising.
And you can stream to your phone. And I set my elderly aunt up to be able to stream it from her Apple TV ~80 miles away from me. And there are phone apps that let you download stuff in advance to watch on a plane. And I've been able to cast Jellyfin from my phone to the TV in a hotel before
I think it's well worth noting that while streaming does imply a full download, it doesn't actually render the full sized download on the client device at any one time, it's simply cached and then the oldest parts are evicted when the cache fills up.
You mean to tell me that anyone can own a nail-gun? We can't have people buying their own nail-guns, next thing you know they might build things that aren't up to code!
The lights in my small Pennsylvania town just got cameras and do seem to be using ML to recognize traffic build-up and optimize dynamically for traffic flow. Pretty cool stuff.
I think the real reason they were installed was because of a new state law that goes into effect this July where you'll be fined if you're spotted holding a smartphone by a traffic cam. Still, the faster light changes are quite welcome.
Most people listen to music in their car. More compressed audio means less fiddling with the volume knob as you drive, regardless of normalization done by Spotify et al.
Re:choice of display, I'm betting it's for power saving. If you need a better display you can use the HDMI port or DisplayPort USB-C port and just hook it right up to a monitor/TV
It can be a useful tool and an economic bubble at the same time. The dot com bubble was due at least in part to the overbuilding of fiber infrastructure in the US.