Is it really this easy?

You know that feeling you get when you know you're forgetting something but you can't remember what? That's kinda how I'm feeling building a 100Gb core.

Is it really as simple as buying this stuff and plugging them in? Or are there some gotchas that I am totally unaware of?

1. $switch_with_qsfp28_ports = C9500-24Y4C;
2. $compatible_qsfp28_transceiver = QSFP-100G-CU1M/QSFP-100G-SR4-S;
3. $fiber_with_correct_terminations = MPO-12 Type B;

I'm upgrading my core from some old Cisco 3750G boxes and it just seems remarkably (and suspiciously) easy to increase the speed by a factor of 100!