Based on my experience, this is probably because modern optical disc drives are utter shit. I have a stack of no-longer-working DVD burners that half fills the top shelf of an entire closet. Not one of them lasted a year, most only a few months. The things just crap out – usually writing doesn’t work any more, reading is often still OK. I’ve tried a bunch of different brands, they’re all as bad as each other. There’s a reason the things cost about five cents each…