Again, games on steam are not DRM free. Online activation is DRM. Requiring online verification to download updates and patches is DRM. Many people here seem to have convinced themselves that only certain DRM methods are DRM. You could make an argument that steam games that don't require steam to be on every time you play just have light weight and unobtrusive DRM, but I, and many other as well, consider having to have a third party program installed fairly obtrusive and non light weight DRM.
Here is some more information on DRM if you are still unclear as what it is:
https://en.wikipedia.org/wiki/Digital_rights_management
Again, Just because a game doesn't use one method of DRM does not make it DRM free. No game that requires steam is DRM free. This is a pretty well understood concept in the rest of the internet. For example, try arguing in kickstarter comments that a game is DRM free even if it requires steam and see what people say to that.
On these forums it has become the received wisdom that as long as a game doesn't require steam to be on all the time that it is somehow DRM free. Probably because those are the excuses Paradox made many years ago when they switched to steam despite their previous stance against DRM. But again, check up on the DRM wiki article if you are still unclear what DRM is.
You can try and make an arguments for why Paradox using steam is good (or at least isn't that bad), but to state that Paradox games that require steam are DRM free is just blatantly false. It seems some of you have been telling yourself that falsehood for so long (or else have misunderstood what is meant by the term DRM) that you think it is true.
In order for a game to be DRM free it must use no methods to control access. None at all. If it uses online activation or key activation it is not DRM free. If it requires online verification to download patches, it is not DRM free. Steam always uses online activation and online verification to receive game updates so it is
NOT DRM free.
However even if you want to argue 'til you are blue in the face that only certain kinds of DRM count as DRM, you would do well to understand that when someone says, "I prefer games that are DRM free", or "I will only buy games that are DRM free" what they mean is games that use no methods to control access.
So when you try and argue with them that, "Games on steam that don't require steam to always be on are DRM free", what you are doing is arguing semantics which is just causing misunderstanding by your refusal to understand what the other person is saying. They are saying they don't want steam or anything else like it. They want to be able to download it directly from a site (or from whatever other source they received it from) and just install and play it with no other interaction with any kind of access control method required.
So in the future when you hear someone asks "Will this game be DRM free?", you would do well to understand that what they are asking is, "Will I be able to just download this game directly to install and play it without any additional access control methods being used?"