Is Intel's PowerTOP Utility Still Beneficial In 2016 On Ubuntu 16.04 To Save Power?

Intel OTC's PowerTOP utility has been around for nearly a decade for making it easy to carry out power optimization tweaks on Intel Linux systems. However, is this program still useful or are modern Linux distributions and upstream code now better optimized by default for delivering an ideal power-savings experience? As it's been a while since the last time I tried PowerTOP, I fired it up today on an Intel Haswell ultrabook running a development snapshot of Ubuntu 16.04...