[Rules] Can non-personnel units dig in?

[triangular_cube]

It is SO unrealistic to ban motorcycle and cavalry units from digging in! Dismounting from either is quick & easy and there have always been horse-holders in mounted units. IMHO, this is another example of a bad PG rule that's begging to be changed in the next edition.

Dismounting has been off and on included in the series in the module rules. Seemingly based on whether or not the designer remembered it was a thing. Once dismounted they usually couldn't remount though, presumably for ease of bookkeeping?