“Gold” media is mostly marketing propaganda. Without seing serious, professional testing results, I wouldn’t trust any Gold DVDR media these days (well, apart from Verbatim maybe).
According to several trustable sources, the reflective layer is NOT the part that is the most prone to climatic degradation in optical media, the recording layer (dye) and the bonding agent are. So what’s the use to have a reflective layer that will last 100 years if the dye is corroded after 10 years, or if the disc falls apart.
Gold has a low reflectivity, so burning and reading compatibility are an issue in many drives, ending in poor low-level performance in many cases. What’s the use of a 100 years lifespan if the disc is unreadable to start with.
“Gold” is known to be used as a marketing tool to sell snake oil. For example, it’s widely used in high-end audio cables, with the funny argument that it would have better electrical conductivity, which is a blatant lie as copper and silver are much better electrical conductors than gold. - This marketing lie has been so widely spread that thousands of people are convinced that Gold is the best conductor. But I disgress.
OK, I’ll concede that SOME Gold media seem to be properly engineered, like the Verbatim Ultralife Archival discs. They have a “dual” reflective layer, silver is still used in combination with gold to enhance reflectivity, and the Azo dyes used by MCC are known to be very stable.
Personally, I’d rather pay a difference to have a [I]scratch resistant[/I] layer over the polycarbonate, a very stable dye and great manufacturing quality, than to have a corrosion-free reflective layer. And each time someone tries to sell me something by stamping the world “gold” on it, my baloney bells start to ring.