Considering companies can easily sell new copies of games after 2 years, I’d still be fine with a longer period of time. I want developers to make money.
I’ve seen a Kickstarter that would open source their game after 2 years if they raised $4.4 million or so. They didn’t reach that goal, but they open sourced the previous game in the series after about 10 years.
For just removing DRM, I think somewhere between 2 and 10 years is the sweet spot. I mean, I’ve still got 10-year old games on my list I’d be willing to buy, haha
I don’t think many people had “a thing” for mermaids though. It was just another human creature with boobs. I don’t think most people thought about it any deeper than that