There really are situations where AGM is warranted but they are relatively rare in vandweller scenarios.

• the ‘dweller installs the battery bank in a location where it is not reachable for normal maintenance
• the ‘dweller needs to mount the battery on its side for some esoteric reason (or is 4×4 trekking so the RV itself can end up in weird angles)
• the ‘dweller chooses to run heavier-than-normal loads like microwaves, electric coffeemakers, electric cooktops, etc. Note this means the battery can be drained faster (and bulk recharged faster), not that it provides more capacity.
• the ‘dweller has has a chemical hypersensitivity.
• the advanced ‘dweller is running a single battery for both house and starter systems (“shallow cycling”) <– not for beginners!