Unfortunately, this is the honest answer. The best bikelocks in the world can be cut with a $100 cordless angle grinder and $20 carbide blade. I watched the CCTV footage of the thief walk up with a Dewalt multitool and hack through my $50 U-lock in 30 seconds.
The same technology that can propel a Tesla to 100km/h in under 5 secs is also the same technology in new cordless powertools. And the theives steal those too!
Your only real defense is for them to have something better to steal. Make your bike uglier!
