It gets worse, Auto makers are now building cars with options in them that require an online subscription and disabling access for more than x time will shut off the option(Tesla, BMW, and others do this now). There is talk about putting the car in “Limp home” mode if access is cut (Car will only have 35mph max speed and limited functions, no HVAC, no Radio, etc.)
A lot of independent mechanics will use the manufacturer scan tool and service applications or use a 3rd party scan tool/applications that is licensed through the manufacturer and still uploads the data.