This is the right way! All I needed to be convinced was to be the lone offspring who faced my mom's basement when she was finally ready to move into an assisted living facility.
She crammed stuff in that basement for 40 years, and never threw anything away.
New telephone? Old one went to the basement.
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New kitchen mixer? Keep this one around, because You Never Know.
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Stuff.Was.Everywhere.
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There's more, in all directions, but you get the idea. I'll never do this to anyone!
Only later did I come across the Swedish death cleaning concept - I'm a believer!