Plex Systems and Duo Security are the only two software of companies of relevance/size - both were bought within the last two years, by Rockwell Automation and Cisco respectively (both for $2 billion-ish). The metro Detroit/Ann Arbor startup scene is tiny. OneStream will probably have an exit north of $2 billion in the next two years.

Tens of thousands of jobs were created by FCA/Stellantis with the renovation of Sterling Heights Assembly Plant for Ram 1500 Production, the brand new $1.6 billion plant on Connor and Jefferson (which builds Grand Cherokee L (WL75) and Grand Cherokee (WL74) in Detroit across the street from Jefferson North (which still builds WD/WK2), and the GM renovation of Hamtramck (Factory Zero) for Hummer EV/Silverado 1500 EV/commercial EV VAN production.

Detroit's economy is still 95% automotive. Those four plants I referenced were huge positive developments for the local economy - SHAP, JNAP1, JNAP2, and Hamtramck are the heart of the working class economy in Detroit, providing good union jobs building high margin products, along with the suppliers that feed those plants.