B------ks if we saved every outmoded useless momument, nothing new would be created. If something is no longer needed/used, if it is of importance, move it to a museum.
Saving everything for posterity means no future.
Sustrans can take over everything to the detriment of any other hobby/pastime or being, my view point is turn all golf courses into housing estates,but I wouldn't like that.
If boaters were not looked as the golden goose, encouraging boating could create even income for the leisure industry in this country.
There are probaly enough people who would like to go boating (thus reducing overall costs) but cannot afford, what is seen as the hobby of the mega rich, by the few.
Rant over.
Ps I live in the land of the Blinking Eye bridge, which is wonderful, permits boats and pedestrians total access to river usage.