I ran a TrueNAS server that was based on BSD, loved jails. Then TrueNAS started using debian so more application can run on it. Selfishly I like getting more utility from my server so this was a welcomed change. What industry is BSD used in now a days?
firewalls are a common example (many Linux houses have a BSD-based firewall at the edge) but any "single application" setup may run on BSD - Netflix, for example.