One thing about full length chainguards is that they are infrequently used with 2x or 3x front chainrings.

I think the only bike I listed above was a 5 speed (single front chainring).

We may start seeing a resurgence of multi-speed bikes with full chainguards with the new internal gear hubs (3x, 5x, 8x, 11x, 14x), and belt drives.