SV specifically had bottomless US defense spending and good local schools to create a talent pipeline. Back in the early days, the defense industry was the primary consumer of chips, which built up the industry via public defense dollars.
Silicon Valley is of course where many things in computing were invented but it is more importantly where business machines became home computers. And in the end that is were most of the graphics cards, operating systems, network switches, software applications and services comes from. Sweden didn't invent many computers or operating systems but it was ready to distribute the next thing once it became available. Just like many good synths and samplers came from Japan but many of the big electronic music artists are from the US, the UK or Sweden.
Maybe I'm reading the parent to harshly. I just want to make the point that talent and money isn't everything. Most of Sweden's successes hasn't come from research spending and top talent but from widespread interest and application of technologies. Spotify didn't come out of Fraunhofer. The Swedish video game industry did arguably come out of the demoscene however.