That's one example, only a small portion of what we do and those devices were made mainly for mobile devices. Adding support for Windows was due to user requests, all our software and full audio interfaces like AXE I/O were Windows compatible from the start.
It is also not IK but Microsoft that would make it necessary for full drivers as our iRig devices have always been class compliant and macOS/OS X has always had great plug and play support for class compliant audio interfaces so it is Apple that is ahead of Microsoft in that way, not IK having anything "lagging behind".