The research has been done- a number of times. "Google" it - but stay away from manufacturer's sites, for obvious reasons. Number of good blurbs from archive & library sites.

Will some home-made (not commercially made- different process) CD's last longer than the 2-5 years without significant degredation? Yes- depending on the specifics of the disc/data layer composition & manufacture, on optimal storage conditions, blind luck, etc...

Most won't.

Your Mileage May Vary.