Many people tried, including myself, but hmmm coding + database + design + hosting... aren't them practically all that is required? And who scans and updates?
CDFreaks has virtually all kinds of information related to CD and DVD recording. It's not lack of information, but organization of information.
I noticed DVDRWinfo.net of South Korea trying a similar thing. Tables for all drives and all media. At first, they looked good, but lots of missing and contradictory information and the more things are added, the more difficult to search. If you have something clearly better than any previous works, please post it.
On the DVD Media test forum, there are just a little over 1,000 posts. But there are thousands more on the various RH-sub forums like this Lite-On forum. How easy is it to search for the right information each person is looking for? I haven't seen even just one person who does a personal management of such database. (Excluding ugly-looking tables like my own efforts or difficult-to-navigate random links to various forum posts.)