This is the reporting feature Smashrun has always been missing. Drag the time slider across your data and everything changes dynamically. See summary level statistics and, with the click of a button, you can compare any length period with an equal length prior period to see how your training has changed. Click on any notable on the By Run page and it will open up a configured Dynamic Run Report to show you the last couple of runs that had that notable.
There is so much functionality here. You can quickly find any run that you are looking for. You can see stats for any period, not just a month or year. You can compare two different periods and see what changed in your training. You can see your summaries of your training leading up to a race. And you can drill down to see how that latest notable compares to the other notable runs that preceded it.