Yes, I do remember column gear shifts, but only ever drove one, and that was an old van owned by my cousin. Forget the make, possibly a Jowett, but it was a 3 speed. Other than that all other vehicles I've driven were floor mounted – some direct to the gearbox, some so-called remote gear lever. Most vehicles were in the Morris Commercial range from the "Z" type, "J" type, Minivan, Morris Minor vans and occasionally the 30cwt & 1ton vans.
The "J" type was odd, the gear lever being behind you so in effect you couldn't see when changing gear.
Other than that, my parents had a "sit-up & beg" Ford Prefect dating from 1959, my uncle had a pre-war Ford Anglia and a Ford Popular dating from the mid-50's. All of these were floor mounted.
I've a sneaky suspicion that one of the larger Fords, Consul perhaps from either the late '50's or possibly very early '60's was column change.
As to why, as you say, probably more complex linkage. The Consul above had a bench seat, that I do remember, and I've a sneaky suspicion that the Jowett van might have been bench. All the other vehicles mentioned were individual seats.
A good topic to cogitate over during my mornings walk!
Regards,
Peter G. Shaw