Yes its true. Grandaparents and parents kept loads of stuff over the years including in lofts but no-one wanted most of it when they'd gone. EVen charity shops werent interested in some. Some went on ebay, some to charity shops but alot of furniture went to the tip. We inherited old crockery sets from grandparents we are reluctant to throw in case someone asks about them or just through guilt so they fill up the garage but we know are kids wont be interested when we're gone.
I now get more pleasure from throwing stuff out and clearing a space than from buying new things.