re: steam can take away your account
I kinda find that argument silly, let me explain:
1. steam is very unlikely to go out of business, even if valve goes bankrupt somebody else will buy them out and continue running the service.
2. getting banned from steam is very hard if you're a legit gamer. if you cheat and hack and exploit on the other hand, yeah ok, you should probably avoid Valve games. valve randomly denying you access is first of all resolveable, second is probably less likely than your house burning down with all your physical copies inside of it.
3. The only issue I would see for people not liking using steam is if they got spotty internet access and having to wait to download a game when you wish to reinstall it. (But honestly there's ways around that, and there's negatives to having a physical copy to install from as well)
So, lastly, the only problem that is factual regarding steam or any other digital distributor - you don't have a shiny box to put on a shelf. It's a problem for old school collectors, where they want the collector edition with all the extra booklets, posters, action figures and what not, to toy around a bit and then put on a shelf to be proud of it and being able to say - "there, see, I have it"