Craig's point about the special tools being well-designed is fair, I don't think Tesla is uniquely bad on the mechanical side. but the software lockdown is a separate thing from workshop manuals. you still can't get root on the infotainment system or run your own diagnostics without going through their API, which is the part that's more like John Deere than a traditional automaker.
Here in the UK (where i also have free tesla repair manual access) i have to pay a daily rate (there are annual subscriptions available) for other marques and i would say it's not cheap.
For example, ford charges me £20/hour or £75/day for access to manuals, wiring diagrams, online connected diagnostics (which sounds more impressive than it is, the UI will show vehicle status like fuel tank level or error codes reported by the various ECUs, without physically connecting to the vehicle, i.e. it's done over the vehicle telemetry link), and the ability to connect via a data link connector device for diagnostics and some reflashing activities. Security activities like key coding require a further (chargeable) registration).
The same setup is available by at least VAG, BMW and Fiat Chrysler (the latter has an annoying extra device registration step the others don't). All chargeable.
That's because they were forced by Massachusetts expansion of Right to Repair laws. Before that in 2021, service manuals were withheld and required $3,187 a year or $371.88 a month to see them. Before that in 2018, it was $100/day to view them. Before that, you had to pay and book an appointment and go in person to view them.