They might sell the recipes if retirement isn't as comfy as they hope it to be, I hope that won't be the case but I don't see them selling any other way
“Recipes” have almost nothing to do with McClelland’s blend’s superiority. It’s all about leaf selection and process, things that can not and will not be replicated without the McNeil’s direct involvement on an ongoing basis.
I suspect the B&Ms that at best combine two bulks and pass it off as a new blend or at worse just rename a bulk and pass it as a house blend will give up or just switch to similar Lane and Stokkebye bulks, but serious house blenders LJ Peretti, Country Squire, Watch City, Boswell, etc. will find ways to continue producing quality products. They'll probably invest in equipment if need be
I think that part of the issue for KBV is that they sometimes sourced small leftover amounts of aged tobaccos of a particular quality to make their micro batch releases, amounts way too small to be used by a company like C&D. It's the sort of stuff that turns up in a forgotten corner of a warehouse. That becomes much more difficult when the warehouse is gone. Since it's not their primary income they can move on and enjoy life doing something else.