The level of control they maintain over the devices after you have paid means I don't feel I am left alone. I feel I only have the rights of renter not an owner

The level of control they maintain over the devices after you have paid means I don't feel I am left alone. I feel I only have the rights of renter not an owner. They do eventually use this power to force you to buy a new house. They use it to mark perfectly capable devices as obsolete e.g. why is a MPB i7/retina/ssd with discrete graphics now being marked as obsolete? Why is an iPad4 not allowed ad blocking with no chance to install an alternative open OS?