Disregarding issues such as cost and storage space, what are your thoughts on having more than one bike (for purely recreational use)?
Is it logical to argue that by using one bike for everything, the body becomes "acclimatised" to the sorts of positions and stresses and strains it imposes?
Or is it more logical to have say a "comfort" style bike for cruising around the park when young family members come to visit and a road bike for "going places" (involving hills)?
Being able to choose the most suitable machine for a particular ride certainly sounds logical. Does stressing the body differently increase or decrease the chance of injury?