There are several companies doing 3D printed concrete. It generally is concrete, just formulated and mixed for being piped and coming out of a 4" nozzle. Ifyouu search YouTube you can find more detailed breakdowns, but the principles are the same as desktop FDM, just scaled way up. That said, don’t expect to be doing this in your backyard unless you have heavy equipment and large scale building tools laying around.
An Amazon box probably works really well as a free enclosure, but I’d worry about the fire risk. The enclosure I made I put a fire detector in just to be safe, making it out of paper would make me very paranoid.
If you find a $100 used server, that server will probably have 2-10 NICs on it. And any time you run a network cable, you should run 2 instead. And nobody wants to connect to a dead port. It all compounds. In a house 48 ports is kinda hard to use, but in a business with 10 people it is easy to fill a 48 port. It’s crazy how network cables multiply like rabbits.
We all know which side of the war Elon would be in the non-mirror universe. Not the side that won.
I wouldn’t call it a shameless ripoff, it’s a fork. Which Prusaslicer was as well. I’m actually glad they did that rather than making yet another closed source slicer. That means that enhancements that Bambu puts in can very likely be ported over to Prusaslicer, and vice versa. It’s a win for everybody.