Changing shops over the years

There have been a few worried conversations around town about the number of shops that have closed recently. I haven't been quite so worried, and I wasn't sure why, until I came across a copy of the 2000-2001 booktown map in an old file at work.
This is what Hay looked like only ten or eleven years ago:
The Children's Bookshop was on the edge of town - that's still there, but B&K Books, which specialised in books about bees, has gone (Karl still sells honey, though).
West House Books and Montpelier Books on Broad Street are also gone, replaced by offices and Oxford House Books.
Many of the units in Broad Street Books have changed. In 2000, Chris Luddington specialised in Golf Memorabilia - he's now opened Barnabee Books, doing Observers and Ladybirds etc. I used to run Shuttlecraft Books with my husband, specialising in SF and Fantasy - that's long gone now, for various complicated personal reasons. Debbie Harding used to do Mind/Body/Spirit and Green books - she moved to Hereford and learned how to make stained glass! And half a dozen other units, selling a variety of subjects, have been replaced.
Hancock and Monks music used to have their own shop, where half of Rose's Books is now - and they've moved back into Broad Street now.
I can't say I even remember Aonybooks - they were on Lion Street and did first editions, apparently, and Lion Street Bookshop (specialising in Boxing) is now the home and part time gallery of Kate Modern.
Lion Fine Arts and Books, opposite the Black Lion, also had a unit in Broad Street. I think they may still sell a bit through Fleur-de-Lys, but they've pretty much retired now.
The Book Warehouse was at the Old Drill Hall - which is now the offices of Hay Festival.
Mark Westwood has moved to the Lake District but there's still a bookshop on that site by the Buttermarket.
Marijana Dworski now sells her Eastern European and Foreign Language books from home - then she was in the Courtyard behind Monica's, which is now offices.
The Bookshop on the Pavement, of course, has just been sold and is having its closing down sale (and some of the shelves have been donated to a local bonfire night party).
Grant's now sells shoes and clothes and household accessories, closing as a newsagents (with books) after the sad death of John Grant.
The other Children's Bookshop is now Wool and Willow in Backfold, and Castle Drive Books is now a (superior) junk shop.
Brennan's Books has gone too - it was in one of the little shops to the side of the Blue Boar, and so has Castle Street Books.
Y Gelli Auctions, where book auctions took place regularly, is now Gym and Tonic, and Pole Position motoring books has gone from Clyro.
Rare Comics was operating out of a garage in Llowes back then, moved into Hay for a year or so, and then disappeared.
That's quite a lot of change for a small town over only ten years, but it seems to happen so gradually that we don't notice it.