chapotraphouse

The thing about long bridges is that what you really need to build them is lots of one-off parts and for the design process to need rapid prototyping of parts.

The other thing about bridges is they only need to be built once and not maintained, and you can basically make a bridge for whatever budget you happen to get. That's why a gofundme works so well as a funding model. You can even have a stretch goal to support weird vehicles like trucks, cars or rail, in addition to the base goal of just AI-powered electric scooters.

hey, i'm a person who owns a 3D printer and knows a quite a bit about them

1. this guy has maybe heard of 3d printing and maybe has read an article, that's about it
2. there is absolutely no fucking way to make a printer for this - it would have to be steel+cement multi material, and you can already forget about ever doing that. the printers for steel and cement are completely and inherently different, and I don't think they even make steel printers larger than roughly the size that would fit in a corner of a workshop/lab, only cement printers are made for large industrial tasks like housebuilding. not to mention how difficult and costly steel printing is
3. even if such a god printer did hypothetical, the bridge would be so ungodly expensive to fabricate and would take so long and there would be so many places for shit to go completely wrong that it would be entirely pointless and dangerous to use 3d printing for the job, you would just be better off building the fucking thing.

maybe in the future it might be possible but in the present this guy has directly connected his asshole to his mouth

You would have been luck building a bridge by the principles of inframaterialism than this.

I would simply type in rocketman and it'll spawn a jetpack on my back

A Bambu X1 takes 8 hours to produce a six inch wheel out of TPU. Francis Scott Key bridge is MILES long.