So,

I am going to start playing and am buying the core set among a few other things. But lately I have been reading about the system losing support and a new edition coming out. I don't mind buy the system and it losing support, there is enough stuff out to be able to enjoy it, but what Ihi am worried about is a news system coming out that is better or that everything that I am buying now will be cheaper in the future.

Is this a valid concern?