It's true that some of the heavy DRM was an issue back then, but I'm not convinced that's guaranteed to be less of an issue going forward. Steam probably won't live forever, and there are tons of titles on Steam that use Steam DRM, third party DRM, or rely on servers that will kill the game eventually. Just because the lifecycle is longer now doesn't make it less of a mistake than it was previously.
My biggest complaint, though, is that the ownership terms simply got shittier with Steam. Many of those old games, even from big, "evil" publishers like EA, explicitly allow license transfers in their EULAs. Steam explicitly forbids transfers.