I'm surprised that an event at what I assume is a relatively expensive venue has lasted this long - most events at venues like this went years ago.
Yes, this kind of venue is disappearing, for the reasons you mention. In some ways that's a shame.
Trader £52/table, clubs/individuals £32+£5 for electricity.
For new stuff this kind of venue has all the problems of the high street. Touchy-feely is-this-right-for-me is the remaining benefit, and personally I'm unconvinced that sufficient for electronic items.
For secondhand and fleamarket stuff this kind of venue is still good. It allows seeing that something actually works and allows
browsing for things you forgot you need; the latter is more-or-less impossible on the net. For individual sellers it would be difficult for the taxman to claim you are a "trader" and ask you to justify that you aren't, unlike fleabay.
BTW, there's a geek fleamarket in Didcot on 11th Feb....
11 FEBRUARY 2108 HARWELL RADIO AND ELECTRONICS RALLY Didcot Leisure Centre, Mereland Road, Didcot, Oxon OX11 8AY (3 miles from Milton Interchange on A34) Doors open 10am to 3pm – admittance £3 (under 12s Free). There is free car parking with disabled parking and facilities. There will be traders, Special Interest Groups and an RSGB book stand. Refreshments available all day. Talk in on 145.550MHz (G3PIA). Details Ann (G8NVI) ann.stevens@btinternet.com.:[www.g3pia.net/radio-electronics-rally]I haven't been so I don't know what it is like. However, you could make a day out with a visit to the best (by far) model railway in the world:
https://pendonmuseum.com/ The photos
really don't do justice to it. See
https://www.flickr.com/photos/lizsmith/albums/72157637563988343 for better photos.
Looks like Pendon are doing workshops for photographing models, including
stereoscopic photos.