That brings recollections of when I used to work in a warehouse. We used electric ride-along palette jacks and had a battery room with a setup similar to what you're proposing. The actual change process only took a couple of minutes, but then that was with palette jack batteries, which are much smaller and easier to move around. Even those were about 3 feet tall by a foot wide by maybe 4 feet long, and weighed enough that if for any reason they came off the machine we weren't moving them without a forklift.
If such a system could be devised, it would solve the issue. However, the logistics are baffling to me. You would need purpose-built vehicles and service centres, which could run into issues involving a lack of standardization. Imagine having to go to your dealership and pay whatever price they choose to set whenever your tank ran dry.
It could also end up being more of a 5-10 minute process, which would be akin to changing your oil a couple of times a week. Still not anywhere near the ease and convenience of liquid fuel.
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I wake up in the morning more tired than before I slept
I get through cryin' and I'm sadder than before I wept
I get through thinkin' now, and the thoughts have left my head
I get through speakin' and I can't remember, not a word that I said
- Ben Harper, Show Me A Little Shame
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