I'm not going to use something that's shitty now in hopes it will be better later in order to avoid using something that's better now out of fear it might become shitty later.
If Steam becomes shitty I have no issue dropping it and pirating my already paid for collection.
Gabe Newell has a net worth of $9.5 billion and there is no such thing as an ethical billionaire. Steam is great and as long as the company behaves well there's no reason not to use it, but billionaires are not your friends.