Besides just moving the line between EV and ICE power to make it easier to stay in EV mode with your right foot, "Pure" also makes various other tweaks to the vehicle to improve not just EV range but MPG in general over a long haul...but, how _much_ does it help?
Is it really worth running Pure for longer drives vs. the normal Hybrid mode?
How about also saving your battery for when it's best to use it (lower speeds) and relying on the ICE for freeway cruising?
What's the actual gain and therefore is it really worth bothering with all this every time you set out on a drive longer than your EV range??
And for fun on the flip side, if you start off with a depleted battery, force the ICE to stay on continuously, and 'hold' any regenerated electrical power, how 'bad' does it get?