If your e-bike isn't a Trek or Specialized, always lock up your bike beside a Trek or Specialized (even if they're not e-bikes).
Guess which one the thief of opportunity is going to take?
Here in Toronto, I'm also surprised by how often I see pedal bikes worth north of a couple of grand locked up with a single U-lock, frequently only through the down tube. If I'm leaving my bike unattended for longer than it takes to grab a cup of coffee mid-ride, I'll have at least 2 locks with me.
The majority of thieves ARE opportunistic, and just the sight of both a folding lock, and a decent U-lock (or sometimes the Beast chain), is enough for them to pick an easier target. I would say that in practice, almost every time I've done a lock up, there's been a high quality pedal bike poorly locked up nearby, and I choose to park beside it.
Also, if there's the option to pick a less easily accessible spot to lock it up say, a middle space in a crowded row of racks, I'll choose that, for the same "thieves are opportunistic jerks" mindset.
I've taken this approach with my pedal bikes for the past 30 years as well. Think of it as a "herd mentality" thing... if thieves are wolves, looking for the weakest prey, don't be the weakest prey. I wouldn't say that it's something I actively have to keep in mind... it's become instinctual with me, well before I bought my first e-bike.
The only countermeasure I could never bring myself to do is the "make the bike look like crap" approach, though the idea of a fake rusty patina on the frame to give it a "jalopy" look does appeal to me aesthetically speaking.
Also, as
@Mike TowpathTraveler said, having a removeable display was a part of the decision making process, because besides thieves, there are also dicks who like to mess around with bikes for the lulz. One of our fixed Bafang displays was deliberately twisted by a dick while we were shopping last year. Luckily it was just the clamp and not the display that was cracked and easily fixed.