I was born too late and missed most of the fun, but still managed to catch the trailing end of fidonet in the late 2000s. Pretty much everything was over IP already, there wasn't a single proper dial-up node in my local network (which was pretty small already, around 20 nodes in its heyday), but for me this IP connection happened to be a pay-by-the-minute dialup ISP, so the offline nature of fidonet helped me stay glued to the computer and actively participate in dozens of communities with just a few expensive online minutes per day. Later in highschool (I even managed to find a teenage crush my age from another city in some echo! we exchanged pics with uuencode in netmail =D) I ran my own dialup node just for fun on an old PII with NT4 in a cardboard box under my bed. It survived multiple hardware and geographical moves and was running over IP up to about 2012-ish, and was finally nuked from the nodelist in 2018. I still have all the configs in the backups somewhere and the active NCs contact, so technically could get it back up if really wanted to. Too bad there's nobody there to speak to.

Addition: turned out, nowadays you can just run the "normal" FTN stack (binkd, husky, golded) in a docker container and access it with a browser. "It's not dead, it's just smells like it". https://kuehlbox.wtf/projects,fidian - no affiliation.

He is a great source of knowledge on physical security for laymen and professionals alike, and leaves an impression of an extremely amicable and well-rounded human being.

In practice, in addition to the usual bugs you would expect from a software-based system managed and maintained by a plethora of organizations and contractors, they tend to become very annoying as parts wear out, so you have to fiddle with the key reinserting it repeatedly trying to find just the right angle so it will make a good contact to be recognized by the lock (for example the iLOQ system by my landlord communicates over a thin contact strip molded into the key opposite of the cutting and separated from the rest of the key with a thin layer of plastic).

While I agree with your sentiment that there's a lot of poor software engineering in embedded space (especially in consumer-oriented novelty products, less so in established fields like industrial or telco), I can't but wonder what's wrong with Yocto? In my experience, it's quite the opposite: Yocto is the quickest path to get the firmware for a new device assembled, once you have climbed its pretty steep learning curve. I have built a few homebrew firmware build systems out of Debian and make/shell scripts (not my choice), you pretty quickly find yourself reinventing half of the stuff that Yocto does out of the box, but it's all bespoke, janky and hard to maintain. While with Yocto you just take the vendor's meta layer for BSP, put your application in another, and it bakes you a set of flashable images on the other end, complete with SDKs and other goodies for your dev workflow, reproducibly. It doesn't get significantly more sophisticated once you start to need kernel customizations, firmware updates with A/B partition layout, readonly rootfs, manage board- or customer-specific variants and other features that are very common in embedded systems but poorly or not at all supported in standard distros.

[0] https://en.wikipedia.org/wiki/Phantom_OS

This is anecdata, but I haven't replaced a single LED bulb since I bought the current set ~7 years ago, and it's nothing fancy, just basic IKEA stuff.

C-band weather radars existed since forever, first using magnetron transmitters and now solid-state amplifiers, though there are still a lot of new magnetron-based systems being installed, with the downside that magnetron pulses are practically impossible to modulate to perform advanced radar techniques that improve different aspects performance. There are also X-band weather radars, which operate on higher frequencies and use more modestly sized antennas (but still larger than you'd like to have on your house roof). They are more limited in range (100km-ish max) due to high attenuation and mostly used at airports, offshore oil rigs and windfarms and similar installations that mostly interested in precise local weather. They are still several hundred thousand bucks.

The biggest convenience for me is that I only have to handle the items twice: when I pick them from the shelves, and when I unpack the bags at home. Going to any other store that doesn't have this system now feels like there is a lot of redundant and unergonomic operations.