Originally posted by eddie1960 not much chance of shooting 8x10 now unfortunately since the film stock is all discontinued. 4x5 is the best you can hope for (and i don't give that a whole lot longer)
8x10 film stock is still in production, even Kodak (but obviously who knows how long that will continue). Monochrome film is unlikely to disappear since it has long since moved over into the artistic world but the size of the companies producing it is shrinking. Ilford now do a special run once a year where they cut all the odd-ball sheet sizes like whole plate and 7x11 as well as the ultra large format stuff (7x17, 8x20 and so on up to 20x24) and that business model works well. There are other small players in Europe producing monochrome film and Chinese manufacturers feeding the Chinese LF scene which is apparently quite robust.
On the colour side there is only Fuji and Kodak left. Both suffer from having machinery set up to produce a much greater volume than is currently needed so the economics don't stack up as well, which may lead to the loss of colour film. All sheet film sizes are cut from the same master rolls, so if 4x5 is being produced there is no reason that either company couldn't follow Ilford's lead and cut the other sizes to order once a year. It just may be that they can't transfer production to a more economical plant without spending more money than would be saved.
Instant film is a whole other ball game with 3x4 (i.e passport film) the only LF size still being produced (by Fuji). The Impossible Project still seems to be limited to selling their experimental batches with no completed film in sight.