I tend to save too much 'just in case'. Cleaning out the house after my mom passed and finding myself too swamped in 'stuff that might come in handy' to comfortably sew has had an effect on me. Wish the effect came faster and lasted longer!!
I'd have more useful space and more time to do things in that space instead wasting time shifting things from place to place and trying to decide what to toss/donate/give away to quilty friends. I am ruthless with rotary cutter blades, although I wasn't always. Got a good object lesson in how dull blades affect not only your enjoyment but your accuracy. Cured me. Wish I wasn't such a slow learner!