I see, I agree on that (though I think I would need to do some concrete modelling to clear it in my head). It's just so intuitive that short lifespan creatures

I see, I agree on that (though I think I would need to do some concrete modelling to clear it in my head). It's just so intuitive that short lifespan creatures evolve quicker... take Blue Whales versus Viruses or Plankton. I might be thinking necessarily they're correlated variables in nature, not that there's a direct mechanism cutting off lifespans. Consider the possibility that creatures with longer avg. lifespans must have longer development time until reproduction. This will affect the average lifetime of reproducing individuals -- so it's an example of longer lifetimes implying slower evolution. In other words, I'm thinking it might be a sort of necessary correlation.