The SSP uses the USB audio class 2.0 drivers in Windows. This is really only supported on Windows 10 for the creator’s edition or later, because that is when Microsoft first released their USB audio class 2.0 drivers. You should use the WASAPI driver type and not MME or DirectX (which are older driver APIs which can come with poor performance). ASIO still exists today but I think as Microsoft keeps working on their WASAPI stuff it will go away eventually. It was invented at a time when there were no other options than MME/DirectX.
I don’t know how Ableton Live handles multiple audio interfaces today. It’s possible that you can only select one input and output device in their preferences menu.
I don’t know what iconnectivity is. I assume it’s an ipad thing. Is your ipad telling you that the 32 bit rate is not supported? We cannot offer multiple bit rates, there is just too much work on the driver side to support all these different combinations of sample rates and bit rates.
That depends on the DAW, it has nothing to do with Windows, Mac OSX or the SSP.
ASIO is becoming slowly obsolete and we don’t have the bandwidth to support it, because we would have to develop and maintain our own drivers. USB audio class drivers are great because Microsoft or Apple provides them and they make the hardware plug and play, no drivers to install.