Also consider resourcing, the manpower, money, tools, electricity devoted to surveillance back then compared to today
How about today? Where could you venture in secret without being tracked? How could you hold a private conversation? Your face & license plates are constantly tracked, along with your personal phone, laptop , watch, fitness tracker, Tire Pressure Management Systems, etc.
If you had to assign a logarithmic authoritarian intensity scale to those regimes, and to today's regimes, how would you rank them? Consider the spying capacity, resources, recording capacity, analytic capacity.
I would put today's regimes many orders of magnitude more severe.
what do you think?