It had never occurred to me what position the gearbox was in after turning the ignition off. I'd often struggled the next time I manhandled the bike out of the garage and put it down to my dwindling strength. Then the light bulb moment. If you turn it off in gear, it remains in gear, albeit in a state of clutch disengagement and with the resultant drag through the transmission. This obviously causes greater resistance when pushing it around, and to some extent, putting it on the main stand. I now remember to select N before turning off the engine.
You learn something new everyday.