Until something goes wrong. And it will.
The greatest tragedy in the opens source movement is it chose Linux.
My eldest son is 18 and has used nothing but GNU/Linux on laptops his entire life.
My 14yr old has used nothing but GNU/Linux her entire life.
My 8yr old has used nothing but GNU/Linux his entire life and he has autism.
My 5yr old has used nothing but GNU/Linux for her entire life.
None of them have ever had any problems that they can't fix themselves and they've never had any trouble doing anything they have ever needed to do.
Even my 3yr old uses only GNU/Linux and he has Down Syndrome.
You must not have the same levels of intellectual capacity as them.