Rowan, yes I've been trying to address it for a little while now. My son knows that anything knitting related is to go to the local knit and natter group. Although my knitting stash is mostly sock yarn, some beautiful stuff, and not many folk want to make socks thes days.
Card related stuff that I'm not using I have been boxing up and that can go to any youth/brownie /guide groups that have craft clubs.
The biggest headache is all the parchment craft stuff I have, most parchers are my age and more so I'm not sure how that will be disposed of. There are so many books and patterns and tools.
I have also just passed on two sewing machines in recent weeks.
I know it has to be done, but in a way it's like facing your own mortality, but the recent health concerns have made me address it all.
And STILL we buy stuff - knowing full well that it may not be used. (Well I do, though trying very hard at the moment to resist)