Indeed, but this company's cranes do not to my untrained eye resemble spider cranes.

Thanks, it looks like what I had been hoping for is called a "spider excavator".

Meanwhile, I was imagining giant weaponized mecha (either real or artistic), in the style of Spidertron from Factorio.

https://wiki.factorio.com/Spidertron

Me too. I’m disappointed. Also, I very much doubt “no height limitations” as I have yet so see anything without limitations.