Classic choice-supportive bias. If it had anything to do with clinging to old ways while a new, better way of doing things was available, than this would definitely be worth debating. But there are basic features missing from iOS that force many people to alter their work flow to something much slower and clunkier than these use now. You are lucky if your workflow can fit into the limitations of iOS. Others cannot and are forced to use other devices, though the iPad hardware is certainly powerful enough - that is what frustrates people.
Needing better multi-tasking, full access to external storage, multi-user support and especially working on cross platform, collaborative work with varying tools isn't an old dying way of doing things, it's the present and future.