No cause denuva works by applying anti-tamper protections directly to the game's binary code.
It serves as an anti-piracy solution to deter unauthorized distribution of games.
If WWW was down sales of any games would be prevented.
Denuvo constantly runs checks to ensure the game hasn't been tampered with, which requires system resources.

Additional DRM or launchers got nothing to do with Steam, it's the dev's codes.

I read that the people in Denuvo are the same ones behind the defunct SecuROM, That may account for some of the distrust, Also look into the past history of other DRMs like GFWL by Microsoft.

But since you're on PC, there may be workarounds by modders. As in the case of every mod, you depend on fans to work for passion, and that Denuvo can be cracked reliably.

Originally posted by derpiman:

how does denuvo work in some specific situations?

Try launching a Denuvo game during Steam maintenance if initial token activation for the Denuvo servers is also required. A warning appears even before the actual DRM protection is applied. It does not matter whether it is the first start or repeated activation for the Denuvo server.

Depending on the implementation, this can sometimes lead to unpleasant surprises.

If Denuvo were to be disabled, or if the server were to be unavailable or if it were to depend on other factors, as in the example above, people might realize what a mess it is. Since Denuvo runs on Amazon AWS, it's enough if something goes wrong there.

I mean, even today there are still old DRM systems in games that have never been patched. And those were simple DRM,- and Copy protection systems.

Originally posted by Pigeon Pecking Keyboard:

I read that the people in Denuvo are the same ones behind the defunct SecuROM, That may account for some of the distrust, Also look into the past history of other DRMs like GFWL by Microsoft.

Sony (DADC), known for rootkits as well as for SecuROM and other nasty mechanisms and marketing practices. A company that sets global standards when it comes to asserting its own interests and fully exploiting the principle of rights management.

Unfortunately, both Microsoft and Sony still exist and the systems in which such companies play a significant role.