A mechanical film camera (say, a Leica) is similar. They are also meant to be opened, cleaned up, lubed, etc...
But even todays machines (depending on manufacturer and origin) are very serviceable. Especially italian made ones.
I had a Dalla Corte mini as main machine but couldnt resist a great offer and upgraded to Ascaso Baby T recently :)
It's a great machine (got it refurbed and it's lasted nearly a decade already), but not at all easy to take apart. It's a lot of electronics though.
I take it the manual ones are easier to service?