I cut a couple open recently, and the legs are actually hollow. No honeycomb. The top ~40mm and bottom 15mm are wood composite plugs, and the center is air. The skin is about 2.5mm thick wood-ish material with vinyl-ish wrap.

Breadth-First Search or Depth-First Search, I think. It took me too long to guess those initialisms.

You also don't need a collapsible steering column, as there is no steering column.

He doesn't just spring them on the reader. Each exercise has a difficulty label. Level 50, IIRC, is for unsolved questions.

The RFC was written in 1990. Very few computers were cattle then.

They haven't yet killed ALL humans.

Is pbrt a viable replacement? (I don't know; I've looked at it but never tried to produce art with it.)

https://www.pbrt.org/

If you want 100 pieces hassle-free, you should probably use a printing service. The service's pricing accurately reflects the hassle they'll endure on your behalf. (They ain't cheap.)

> when was the last time the community (or another manufacturer) actually contributed anything useful to the core HW and electronics design?

E3D has driven the majority of hotend innovation, not Prusa. Ultimaker's Cura and PrusaSlicer cross pollinate regularly. Grégoire Saunier created the Bear frame. Numerous other nonprofessionals are creating small and not-so-small improvements which haven't become well known.

But yes, the bedflinger FDM architecture is mature. Innovation is incremental now, not radical.

Or just let him park at your place.