I've been working on a pedalboard for the last ten years on and off that allows me to play two synth lines simultaneously, one manual and one arpeggiated off the first note in each bar sampled by a modified EHX Freeze pedal. The idea was mostly inspired by this Freemasons track:
This is what synthbass is all about for me. Bombastic, pumping and jubilant. When I had the EHX into the Moment Machine and then arpeggiated into the C4 AND a manual line through the FI, I wore the biggest shit eating grin in decades. It worked so long as I could time the sampling to grab the right note, otherwise I wouldn't have been persisting for quite so long. A single pedal that could achieve all that with tap tempo (ideally without needing to press a button to sample every bar) would be a god send.