I wouldn't say any of the newer artists (by that I mean from the last 15 years or so) have been lost to streaming. I remember in 2010 being called old fashioned for buying a CD because everyone was using Spotify by then. Those who have faded away were probably going to anyway.
It would be more logical for artists who had their heyday before streaming existed to be lost to streaming. There's plenty of acts who had successful chart careers in the 20th century who are still releasing new music that doesn't have a hope in hell of making the Top 40, but then these artists Top 40 careers were over before streaming counted.
As for the Swedish influence, that's probably true but as songwriters the Swedes ruled the pop charts long before Spotify.