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All BEVs are big for their class / size though. Part of that will be the increase in crash protection over your older 3 series but also just the size of the battery. Especially in flat floor ground up EV chassis.
The good thing is that Tesla and most decent t new EVs come with a host of cameras, sensors and auto functions that really make driving something bigger, easier. It's also worth noting that visibility in a model 3 is fantastic due to the packaging and sparse dash.
I would be bang into a Tesla but its bigger in length and width than my 3 series, which won't do it for encouraging my wife to drive a little more (which she wants to do but hates big cars).