I have little experience of derailleur gears, having only ever owned bikes with in-hub-gearing (IHG). The only derailleur exceptions were whilst testing various brands and models after a 35-year abstinence in 2015, and the random necessity of borrowing bikes when visiting friends in Germany - which was what convinced me a folding bike was necessary, even as my only bike.
For me, an IHG, and especially the Rohloff, just fits so nicely. There's no faff'ing around with different levers, just a quick twist of the wrist to go up and down the gearbox as necessary. It helps, of course, that the Rohloff's 14-gears are so ideally spaced, with no duplication, and there's no difficulty in going past multiple gears at once. …the ability to change gears whilst at a standstill is priceless - which always caught me out on borrowed derailleur bikes.
The low maintenance and longevity of the Rohloff hub also impresses; and it gets smoother with accumulated distance. For a folding, or even a touring bike, I would always go for IHG. However, if I were a speed merchant trying to keep up with a pack of similar, then perhaps not. They would (no doubt) laugh their socks off at seeing my IHG anyway. But even if I have to move to an electric bike in the future, it will likely have a Rohloff gearbox fitted - although the over GBP9000 price tag made me wince when I recently spec'd out my 'ideal' electric bike.
With apologies, if this reads like an advert for Rohloff.