My record collection still sounds good

I started collecting records in 1964 when the Beatles came to America.  From then until the mid 1980s I bought hundreds of 45s and LPs.  I never threw a record away.  Today Lee requested the Rolling Stones which I only have on vinyl.  He picked out Aftermath which I bought in 1966.  What happened to those 40 years.  The number one cut was Paint It Black which was a big 45 RPM hit.  The quality of this record was quite good.  I bought a turntable a few years ago so I can play my records.