Stockholm's weather and geography is very different than Berlin, Amsterdam or Copenhagen. Bike infrastructure is also a second-class citizen for now and the public transportation network doesn't allow bikes (except local trains out of rush hour) which doesn't help usage as it's a sprawling city focused in multiple "centers" located around stations.

The ECF data you mention is from 2012, it's 10 years old...

Not sure what you are basing your hard limits on, care to share if it isn't just guesswork?