Life runs too fast for me on caffeine, yes I can blow through work faster, but when I was on caffeine it would feel like days, weeks, months would go by in the blink of an eye.
I wasn't enjoying the moment.. and then I stopped drinking caffeine.
Life became more present for me, not slower in the bad sense, but that I was able to relish every moment more, more aware... more conscious of what was going on around me. My fuse also got really short when I was consuming caffeine, I'd get into a lot of fights and arguments, since I've stopped, it's really helped.
I still get all my work done and have time to spare, I'm working, going to school and have an infant at home. So life after caffeine is definitely possible.