No one wants to adapt lenses forever. If that's your chosen path then good for you.
Everyone will eventually want to buy native lenses. Otherwise why do you think manufacturers spend the time and effort not to mention cost involved in developing lenses and new mount.
You can adapt a-mount lenses on to e-mount too and four-thirds lenses on to m43 bodies but not many people want to do that.
Pros don't keep the system alive or even make them a success. They are not early adopters, they follow afterwards when the system is mature and reliable. How many pros do you think bought and used Sony e-mount to make it a success? It's amateurs and enthusiasts that buy it first.
Canon and Nikon have a large user base so it'll take longer for that happen for sure but EF and F mount will go down the route of a-mount eventually.