100 is a bit much, a good ebike can cost several thousands. IMHO the main driver for adoption is the availability of dedicated infrastructure. I can afford an EV but chose to use a bike because the infrastructure is excellent where I live and it allows me to avoid traffic and congestion.
Rocky linux is definitely for desktop too. It was designed as a successor of Centos, which was widely used in medium and big companies. We currently use Rocky 8 where I work. It works fine.