I dont' really understand the reason for using securerom with steam. I see that many publishers require drm; but in steam case valve (the publisher) is not asking for secure-rom on top of steam drm.
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My problem with securerom is that it is buggy

The revocation stuff almost never works because the reason I end up having to install a game more than once is the old system needs to be reinstalled.
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As to how buggy is secure-rom; look at all the issues cdp had with witcher 2. They ended up just dropping the drm because it was causing them so many headaches.