I've also had very good luck with the discs I've burned over the years, and never had a commercial disc go bad. From the earliest days of recording DVD (Win XP/P4) I still have regular DVD's from Laserdiscs that work like new.There’s a disc format known as “M-disc” that supposedly will last 1000 years. My burners are supposedly capable of burning them, but they are not cheap, and frankly I’ve only had a couple of CDs age out, and those were kept in a car for a decade or so. Since I made the first ones, the replacements were simple.
However I am a big fan of the M Disc also. Great results in burning & compatibility with playback equipment. I use CD, DVD, & Blu-ray M Discs as needed. I am selective... material that I couldn't easily restore today, projects that are simply very important to me, and much family history. I figure some how, some way, there will be a way for a long time to playback these discs & this is the kind of stuff I want to be available for my grand kids & beyond, if they care.
As for cost they are as noted more expensive than regular media. But the cost has come way, way down since they first came out. And to me it's worth it.