I’d argue that’s 3d printing’s niche. Bricks are either expensive or require very long wait cycles to get the right parts from remote vendors (mostly China). T

I’d argue that’s 3d printing’s niche. Bricks are either expensive or require very long wait cycles to get the right parts from remote vendors (mostly China). They are also relatively big, which makes tight builds difficult, and they require a decent amount of expertise and building technique to make anything non trivial (that’s putting aside the mechanical knowledge that would be need whatever the material used). For purely mechanical prosthetics it’s less of an issue, but adding electronics is also a PITA if size/weight matters in any way. As an example, this youtube channel (https://youtube.com/c/BrickExperimentChannel https://youtube.com/c/BrickExperimentChannel) has some pretty advanced builds, and it often comes down to bricks as a frame/skeleton, and custom parts for the critical core. In comparison 3d printing has a way higher upfront learning curve, but the people trying to build these contraption aren’t doing it for fun and would arguably be motivated to invest time and effort to make things better in the long run (they’d have to do it anyway even with bricks).