I would like to suggest more levels of Robopacers. I’d like to see a Robopacer at the 1.3 watts/kg level. 1.5 is too difficult to maintain, especially as an older rider.
Try riding with Taylor but use a gravel or mountain bike.
Lately I join a low w/kg robo and as I warm up , I will increase my weight to make myself work harder. That way, I keep earning extra drops without transporting to a new pacer.