I founded a company and reached $6M ARR with >50% net profit margin. After 4 years decided to do a full rewrite. Finished it successfully within a year including full migration of all clients. Was the best decision ever.
Exactly this. It sounds easy but this type of creator who can do this is very rare but usually has a high success rate. This should be the defintion of the "10X dev"
OP had the thesis that the "Norway sovereign fund" is funded by high taxes. This fund is also known as the "Oil fund":
The Government Pension Fund Global, also known as the Oil Fund, was established in 1990 to invest the surplus revenues of the Norwegian petroleum sector.
Conclusion: The Norwegian society is not just rich just because you are that smart. You obviously had a good portion of luck.