In the past eight years, so much has changed. So much hasn't. The sun still rises, for example. That's the same. But erotic game brand-wise, much has changed.
As website Canned Dogs points out, of all the Japanese adult computer game brands in 2002, only 20 percent of them still remain. Some of them went under, some of them were absorbed by larger companies and some are simply on hiatus.
Most businesses in general don't do much better, let alone niche products like eroge.