Complex sentence: Individual platforms--for instance, the Sega Genesis and PlayStation 3--are seen as difficult to develop for compared to their competitors; and support for new technologies such as multi-core processors and hyperthreading are things developers are not yet fully accustomed to.
Split into simpler sentences: Individual platforms--for instance, the Sega Genesis and PlayStation 3--are seen as difficult to develop for compared to their competitors. And, support for new technologies such as multi-core processors and hyperthreading are things developers are not yet fully accustomed to.