I came to the same conclusion with my bike. What's the point of an expensive and heavy chain lock, when the thief will break or bypass it anyway.
So I just fot a cheap wire combination lock, just so you can't just jump in the bike and ride away.
So I just fot a cheap wire combination lock, just so you can't just jump in the bike and ride away.
What I've been using for years is a heavy chain with a lock (disc-detainer style). The chain weighs around 3.5kg. You can of course cut it with an angle grinder, but have you ever tried cutting a chain with an angle grinder without a vise? The chain slips away and it's really difficult to hold it in place for the cutting, which would take more than a minute.
All those Kryptonite-style U-locks have the disadvantage of being easily fixed in place for the cutting. They are also useless for attaching your bike to large trees, street lights, etc.
Remember that if a bear is chasing you, you don't have to outrun the bear, you only have to outrun your friends. If there are 4 bikes and my bike is the most difficult to steal, I'm fine.