I restarted short-touring on a Brompton folder - for me, there's so many practical advantages for a ~5% speed sacrifice. Anyways, I found yet another really practical advantage over full-frames in its step-through style frame.

If you have to carry the bike for a long distance, you can flip it upside-down resting the step-through "V" around the back of your neck, with the bike's weight resting evenly on both shoulders, arms wrapped around seat on one side, and handlebars on the other. For me, it's near ideal CoG is far more comfortable than single shouldering a triangular frame and I use all the time: bushwacking in the woods looking for stealth camping, taking the bike to a nice spot on a beach, hiking tough trails to swimming holes, covering long staircases, etc.

Not sure this applies to the OP's e-bikes given the addition, and offset, weight though.