If it's just gas and go, then there is no need to have the Range Extender always on. You can just just drive the first 150 mile in pure EV mode, then turn on the Range Extender, and gas and go from there.
There has NEVER been a PHEV/EREV that couldn't do this. It would be an Epic Fail if Harvester can't. A few people are just leaping to bad conclusions.
The worse ever example that we bring up as a cautionary tale, was the i3 Rex.
But even that could just gas and go under ideal circumstances, but it ran into problems under less than ideal conditions, like very long uphill grades, or even very strong headwinds, that forced it to slowdown, because it's Genset at 25 KW was inadequate to handle anything much beyond ideal conditions.
I'm 99% certain that Harvester will have true gas and go capability while NOT towing.
But it won't be gas and go while towing. If you want to tow at highway speed you will need to constantly draw down the battery to compensate for the limitations of the Genset in that role, and thus will need to charge the battery during RE operation while towing to maintain highway speed.
