Poor durability. In addition, the gear range is suitable only for short, low-effort rides. I used one for city commuting until it simply failed mechanically. In sum, the Nexus 3 is not in any way better for ownership than a working derailleur transmission. For a rental, there may be some value proposition.

The Nexus 7 proved reliable; the Alfine 11 a good value for durability and range of speeds; the Rohloff is brilliant but yes, those 14 speeds are expensive.

The choice depends on the rider's needs. I'd rather ride an IGH bicycle for the reliability and value over 10 years of riding. I'm not sure that an indifferent/infrequent bicycle user (the sort who lets things rust and never checks tire pressure) would care.

For the purpose of long commutes it's possible to buy an entire e-bike in 2024 for less than the price of a Rohloff hub alone.

The Alfine 11 and the Rohloff are brilliant. The Rohloff is a joy to use on all types of terrain. Instant shifts without fuss.

It isn't. It's good enough for small hills and requires very little maintenance or adjustment. And it's cheap.

They are always sold with wrong sprockets. The high gear is never usable. Number 2 gear is connected directly, and so it should be the default on no-wind flat road. Then it lasts forever on flat country like holland.