Even though (as I previously stated) I'm firmly in the 1x camp, the comments about a 2x setup providing better (tighter) gear spacing are valid. Especially since the Trek's 1x is only 10-speed compared to the one on my bike which is 11-speed. I went from a 9-speed 3x on my first bike to an 11-speed 1x on my current bike, so the gear spacing wasn't all that different. Going from 9-speed to 10-speed, the difference is more dramatic.

Sometimes visuals help, so here's a quick graph comparing the gear spacing on the 2021 and 2022 FX 3. Most of the gaps are noticeably smaller on the 2x system. I'd still probably opt for the 1x myself just because I really love the simplicity, but it's not quite as clear-cut as it would be if it were an 11-speed.