2old

Calsun, take a look at the Altor lock referenced above. Not very viable since it weighs 14 or so pounds, but it took a young strong-looking guy two angle grinders, six or so blades, six or so battery packs and 100 minutes to defeat it.

Pop N Wood

Aluminum clogs abrasive wheels causing them to overheat and disintegrate. A not uncommon cause of injury with the unexperienced and bench girders.

But a sawsall would make quick work of the aluminum part. Not so sure about the metal shackle underneath.

Any youtube videos of that lock being attacked by a sawsall?

I lost all my bookmark recently but read a recent article saying the majority of bike thefts one shop sees are leverage attacks, just bending the lock off with a crowbar or pole from a street sign.

2old

My son had a neat bike U-bolt locked to a steel plate embedded in the wall of a locked garage with a locked gate around the garage. Thieves got in and sawed the steel plate; guess they would remove the U-bolt later at their leisure.

rm -rf

Yeah, cable locks are for very short term lockups. For a bathroom break, or a snack at a convenience store.
Even fat cable locks can be snipped with good electrician's diagonal cutters. Bend the cable a bit, and snip a few strands at a time. It's quiet and stealthy.
Angle grinders are loud and dramatic, with streams of sparks flying.

With an e-bike to carry the load, a small u-lock for the front and a heavy hardened chain would be a good deterrent. I'd use it for shopping, but not for an all-day or overnight lockup.