This reminds me of a recent complaint about some software which didn't work properly with a certain sync service, and the developer response was that the third-party service was buggy so it wasn't their problem.

Ok, but personally quite a lot of my job involves working around the bugs and quirks of old unmaintained Windows OSes. The customer rightly doesn't care, they just want your software to work. It is almost always possible to at least mitigate the problems of whatever buggy garbage hardware/software you have to deal with.