About 15 years back the Steam Railroading Institute obtained the old Pere Marquette turntable from New Buffalo, MI; added 5 foot extensions to each end (to make it long enough to turn PM 1225; it had required "frog jumpers" to handle the big Berkshires back in the day); and dug and finished out a new pit at their facility in Owosso to install it in.
Almost no sooner was the concrete dry than the host railroad Tuscola & Saginaw Bay (now Great Lakes Central) started "borrowing" the use of the turntable to reposition diesels for servicing in their maintenance shops next door. Seems that turntables are not as obsolete as some might have you think, even in this day and age.