Google News - 90 percent of growth in high-tech jobs happened in just 5 metro areas:
https://www.vox.com/recode/2019/12/9/21000162/high-tech-job-growth-concentration-brookings
https://news.google.com/articles/CAIiEAOFbmTL2zjdJIdw5NnXWeYqFwgEKg8IACoHCAowlOzSATCaiDUwo9dy?hl=en-US&gl=US&ceid=US%3Aen