The bar you swing your leg over is the last obstacle before the hill. Take it away, and everything changes.
There is a moment, common to almost every rider we speak to, that decides whether a bike gets used or gathers dust in a shed. It happens before the wheel has turned. It's the leg-lift.
For a fit rider in dry weather, the leg-lift over a traditional top tube is nothing — a half-second, a bit of balance, on you go. But add a fully-loaded pannier that shifts the balance, or full-length waterproofs that catch on the saddle, or a hip replacement that turns any rotation past 90 degrees into a small dose of pain, or a below-knee prosthetic that doesn't want to swing over anything, and suddenly the leg-lift is the whole ride. Miss it and you're on the ground. Get it wrong and you don't try again tomorrow.
The step-through frame — where the top tube arcs low, near the bottom bracket, instead of straight across at seat height — quietly removes that entire moment. You walk up to the bike, step over a bar that's at ankle height, sit down, and go. No swing, no lift, no balancing act, no snagged Gore-Tex. It sounds like a tiny thing until it's your bike, your knees, your last ride of the year.
We built the Juliet 2 around this frame geometry because we kept getting the same phone call, week after week: "I love the idea of an e-bike, but I can't get on and off the one my son bought." Every one of those callers deserved a bike that fit them, not the other way round. So we specified a step-through that drops far enough for a rider in full waterproofs to swing on cleanly, but stays stiff enough that the frame doesn't feel wobbly under power. The two are usually in tension. On the Juliet 2, they aren't.
There's a side benefit worth noting: the low frame makes the bike safer to stop and start in traffic, too. Both feet flat on the ground at a junction, panniers still upright, no leaning the bike against a lamp-post to sort yourself out. Any rider will appreciate that. Riders new to e-bikes will appreciate it enormously.
"Adaptive" is a word that too often gets used to describe kit made for other people. It shouldn't. Adaptive design is the practical acknowledgement that bodies vary, weather varies, terrain varies, and a well-made piece of kit meets those variables halfway. The step-through frame isn't a compromise for a smaller group. It's the correct answer for everyone who has ever tried to swing a leg over a fully-loaded bike in the rain.
It unlocks the hill for the rider who thought they'd finished with hills. Which is the whole reason we do this in the first place.