I also miss the old 'swing' knob from WAY older arrangers and drum machines.

Take ANY rhythm, and gradually make it swing more or less. Nowadays, the rhythms and fills are too defined, but any old straight 8ths or 16ths rhythm could provide a host of variations with nothing more that a varying twist of the 'swing' knob!

There is a lot of different amounts of swing that work, but now you have to have a separate style for each degree of swing. It was so much simpler, back in the day!