Try doing video post with vari tempo music,.... I know I would probably go mad if I had to do it in current Reaper :) But on the bright side, most basic aspects are well done and more efficient, with some great advantages like elastic audio, real-time pitchshifting, timestretching and resampling, so you can always work from original source, no matter how you change tempo during the project. Fits my needs very well. :)