@isamuelson
your games were not taken away because you paid for them, but what I said about the demo is that steam has the power to take your games away if they wanted (they are not doing it but they can if they want)
they have been running for close to 10 years
Fate Bankruptcy
Successor CircuitCity.com
Founded 1949
Defunct 2009
just because a company is running now, doesn't mean it will be running in the future (when a company has been around for 60 years, you don't expect them to go out of business but it happens)
your games are working find now but what about is 1 year, what about in 5 years, is there any guarantee that they will still be around?
when you have a internet connection and nothing like trainers or other esoteric apps running, steam's DRM is rather transparent but the moment that changes, Steam can throw a temper tantrum like the world has never seen
steam needs internet for both multiplayer games and single player games, with out internet the offline mode will only be useful for a short period of time before steam assumes that you stole something and kills the game until you connect to the internet again
Steam games also benchmark lower compared to cracked games (mainly because steam constantly checks to make sure you are not running anything that can effect it's DRM (a few of my friends had their steam accounts banned and they had to go through a large hassle to get the accounts working again because they used a trainer for a single player game. While not all trainers will cause this, it shows that the DRM is more of a hassle for legit customers.
just because a company has been around for a while doesn't mean they will be around for ever. Look at how many large banks went out of business in the past 2 years (even though they have been going for up to 50 years in some cases )
theres no way to predict the future, so you must always take into consideration the possibility of the company dying tomorrow or the day after that. think about what will happen to you if it happens, if you are a steam user, all of your games will stop functioning shortly after the company dies.
As I said before, Steam as really bad DRM, it is just more transparent to the user when things are going properly (eg a stable internet connection, no software that can cause the DRM to freak out, running in the background)
but when things don't go as planned, Steam can be a real bitch.