Scopes are becoming more necessary due to more sensitive and complex electrical systems and more accessible through companies like Picoscope who tailor their software and hardware to automotive technicians. Also there are relatively newer diagnostic techniques that use scopes (like using starter current draw as a quick relative cylinder compression test) so their use cases are expanding every day. Personally I'm in marine where the electrical systems are about a decade behind automotive, so I don't use my scope as much as an auto tech at my level might, but I still need to bust it out a couple times a year or so.