I currently have 3 Thorns.
My 2012 Raven Tour with Rohloff hub and drop bars:
replaced my modified old steel mountain-bike as "heavy tourer":
I built up my 2014 Raven Tour frame as an 8-speed hub geared utility bike:
to replace my very old 5-speed hub geared 650B:
I built up my 2016 Raven Sport Tour frame as a fairly light road-going bike with Rohloff hub and drop bars:
to replace my 1977 lightweight 700C tourer. No photos of the latter, it is currently in bits for a major overhaul.
I still have the old bikes. The old steel mountain-bike is now used as a "visitor bike", with sit-up-and-beg bars and a 7-speed hub gear.
I often take my old 5-speed hub geared 650B to work, where I use it on paths and other moderate off-road situations for survey work. No qualms about locking and leaving it.
When I have finished the overhaul I shall probably keep the 700C tourer for occasional use in good weather, it is the only pure derailleur bike I have left (one of the Bromptons has a two-speed derailleur combined with a 5-speed hub gear).
There is another "visitor bike", a lady's frame with sit-up-and-beg bars and a 3-speed hub gear.
In addition to that lot, I also have two Bromptons, one used very regularly for train-assisted commuting, the other used for longer tours when I combine cycling with other transport.
My wife has a lady's frame 650B bike with sit-up-and-beg bars and an 8-speed hub gear, plus a Brompton.
And, finally, my old two-wheel trailer.
So a total of 11 bikes and a trailer in the family, but no car, though I do hire cars and vans when necessary.