I'll grant you the vibecoding comment. That was uncalled for and unjustified.

From an EE perspective I still see limited value in having a 3D breadboard. Having a standardized schematic language is really nice. Everybody knows how resistors, capacitors and transistors look like in a schematic, whereas they are all just little cuboids with varying number of pads in their smd packages. I recommend multisim blue for learning btw.

Nevertheless, a cool project and I should be more positive when commenting.

Is there a good free circuit simulator (that use a schematic as interface, I assume)?

I somewhat agree with you in general though—if the web UX is a breadboard… maybe just get a breadboard? At the same time, while physical parts are generally cheap enough, power supplies, multimeters, an oscilloscope… that part of the hobby can add up.

Sometimes too I am waiting a week or two for a part to arrive from Mouser, it is nice to be able to mock up a circuit online.