The Kalpana One presents itself as a practical modern design for a space station with artificial gravity. One of the tweaks that it made was to limit the length to diameter ratio. This leaves it looking somewhat stubby compared to the old O'Neil cylinder type or other fictional stations. Their justification:
The radius is the minimum necessary to provide 1g at the hull when rotating at no more than 2rpm. The length is the longest possible while ensuring rotational stability.
I don't expect that this would absolutely rule out the slender designs forever, but there is some concern about disturbances that longer stations would be subject to, and I can't quite understand what. You'll have some wobble control either way, but what is it exactly that would make longer designs more challenging to manage?