If I thought I needed two Abus Granit-X U-locks to keep my bike and wheels secure, I wouldn't stop there for lunch!

You don't have to outrun the bear, only outrun your buddy.

Cable and strap locks can be cut with pocketable tools, creating an 'opportunity crime' vulnerability.

There's anecdotal evidence that two less secure locks have a better real world track record than a single more secure lock: fuss and bother deter as much as physical resistance.

There's a school of thought that once you get up to the quality and size of u-lock that takes at least a ginormous, sharp, high quality bolt cutter to get through, you're dealing with serious bike thieves who have the tooling required to cut their way through anything, so why pay the money and carry the weight for any resistance beyond that?

There are locking & gravity skewers to retain the front wheel.

What you lock to is as important as your locks.

Use good locking technique.