Are the plastic holds themselves an example of the technology we're thinking about here? The gym is, itself, a technology that has pushed the envelope on climb

Are the plastic holds themselves an example of the technology we're thinking about here? The gym is, itself, a technology that has pushed the envelope on climbing. When I was learning in the 90s there was no gym where I was and if I wanted to practice I had to climb buildings. It's much easier now to find good places to work out climbing technique without traveling to the cliff.