I almost went to the 'National Scionwood Exchange', held at Stowe Landscape Gardens. I have a lot of pear wood to exchange, and wondered if I could buy pear stocks in small quantity, as I need some maidens to establish new cordons. I got a pretty patronising response. No they didn't have any Quince A, but had I thought of using Pyrus communis or wild pear? I thought of my in-laws' 100 year old wall pear, which produces a profusion of spiny suckers, uncontrollably vigourous growth and very poor quality pears, plus the great length of time I'd have to wait before such a tree produced its first pear, and bit my tongue quite hard so I didn't feel tempted to reply with what was going through my mind.
Following that suggestion, I've a fair idea that the only wood on offer in exchange for mine would be 'heritage' varieties I've never heard of, fine to keep going if you have unlimited space for a fruit archive, but probably varieties I would personally discard within my own semi-intensive system for not offering minimum standards of health, productiveness or fruit quality. I'm all for the preservation and re-establishments of traditional orchards, but the primary purpose of growing fruit has to be for personal need; maintaining fruit museum would be lovely, but simply not practical for the majority for small amateur growers.