I have an Aventon abound cargo bike, and I'm about 220 riding weight. On 2nd level assist (of four levels) which is where I ride 99% of the time, I get about 30 miles. Fairly flat terrain. I also ride on the fast side and I'm in decent mountain biking shape - that definitely matters, I almost never touch the throttle.
Most cargo I've had on it was around 150lb. No idea what the range reduction would have been but the bike handled just fine.
Not in Seattle (phoenix az area) but we have an ioniq and a ChargePoint L2 ccs charger on a 50A circuit. Works like a charm - plug it in and forget about it. Zero issues, just over a year. I had the 240V/50A circuit already in the garage, and wired it myself (carefully... ;) )