FWIW if you are training for real life mountain rides I think you should train at 100%. I know that setting the slider at 50% only affects gear range and not power output but you should train to the gear range you will have in the mountains. The fact is you engage different muscles in different ways when you ride at 100% and that is ideal preparation for a similar experience in the mountains.
I agree, but you've got to ride with similar cadence and heart rate. For lightweight riders having a standard setup@100% is fine because it transfers to outdoor.
I could use my Tripster on 100%, but rather leave my CXR on the turbo full time and in my case leave resistance on 50%. The setup then allows me to spin at the cadences I need to replicate outdoors.
I know with accuracy that at a certain cadence and HR, the power I'm making so don't really need to have a PM on my Tripster. For me its about cadence, whilst training or riding generally Zwift/Trainer-Road.