The VISOR is always being tweaked or repaired or used for something cool. Data's eyes? Always assumed to work. Anyways, I like the VISOR better. It's like open hardware. Side thought. It would be cool to see an episode where cadets have to build their own tricorder from scratch, like a Jedi making their lightsaber or an ancient Roman metal caster making a dodecahedron.

That was the moment Geordi thought about upgrading his visor with a phaser.

Data's wit is 1000x faster than the average humanoids.