Just search for 3d printer board. As just one example the SKR range of boards from Bigtreetech com without firmware.

Most consumer printers these days come with open source firmware on them. For example the Ender series, or all creality printers, all Prusa printers, etc.

Bambulabs is just one of the very few examples that run a closed source firmware.

Every single 3d printed part that is ever produced? Who should add the serial number? Are steel pipes from the hardware store also serialized?

Ok, which part would know it is a part for a gun? And how would it know that? If the file name contains the word „gun“?

Which manufacturers are you talking about? The ones making the electronics without firmware? The open source firmware which anyone can install or modify? The open source web interface that anyone can install or modify? The open source slicers where anyone can use any slicer they wish to (and also are used to generate gcode used on multiple different machines)?

There is simply no point in this chain where something like this would be enforceable

If you are serious you have no idea what you are talking about.

Suddenly? Like since the tariffs?

Even worse.

The Fujitsu Futro S740 are quite nifty little devices which can be found for around 50-60€ on the used market. They use <5W at idle and have more compute power than a raspberry pi 5.

A nice writeup about these can be found here

Who needs a domain anyway

Is 2.0 backward compatible with 1.x?

Lock or unlock?

Quick note: libation can also save audiobooks that are free to listen to on audible.

You are talking about photos. PNG is not the right format for photos.

No, but it should still work. Getting rid of alpha channels would break all of that.

I don’t get why they didn’t just buy ebooks? Why go through the trouble of scanning physical books?

They could have just bought the ebooks…

The last refurbished drives I bought were all in the range of 10€/TB

I take it, you have never been asked to help someone with their windows machine. Did you count the toolbars in internet explorer?

As an anecdote: I have one system (x86) with pi-hole and unbound in a docker, and a secondary raspberry pi with pi-hole running on bare metal. The docker system (although much more performant in general) has a lower latency as the raspberry bare metal install.

I have all these services in docker as well (although not with the docker compose file here) and they run perfectly fine with a very low resource footprint.