Copenhagen is a bit more English-friendly in employment from what I gather, even outside tech, so could be an option for people who want to stay in Scandinavia but have trouble finding an English-language job in Sweden. For example the entire Maersk corporation, the largest employer in Denmark, is English-only for corporate business and hiring, except a few jobs that interact with things like the Danish government, local catering, etc. My guess as to why is that Danish tends to be harder than Swedish for foreigners to learn to a level that Danes can understand, so companies don't expect them to.

Some couples straddle Copenhagen–Malmö (35 minutes by train from each other across the strait).