Storage can be a VERY useful stop gap though. I didn't begin to get rid of or sort through the thing I was keeping, until I had been at a new house for a while and had room to store some of it safely out of sight (we had had no attic or shed before)
It changed things a lot just to be able to break it down into small parts, and get on with living while it sat there doing nothing for a few months.
It meant I could go about my normal life, without wrestling with stuff everywhere, and also go through certain things in the house while not getting overwhelmed.
As soon as one lot was organised/disposed of/whatever, I had space again to grab another lot from the attic and start over. It meant that gradually the house, and the attic, got cleared and rationalised.
Part of it was that I inherited a whole house worth of stuff that I didn't have the heart to just throw away or give away. A good deal of it was rubbish, and that went the way of all rubbish, but lots was also very lovely and interesting, and processing it was important to me - no one else in the family wanted to do it.
I found it really fascinating. But now, not only have I got rid of a lot of that stuff, (lots to charity shops etc) but I've got rid of a lot of my own stuff too.