Cassettes -- sheer modern luxury !!
When The Beatles' "I Wanna Hold Your Hand" came out in 1964 I had just received a miniature Japanese reel to reel tape recorder. Naturally I took it with me to the nearest record shop.
Results weren't bad but the machine had a fatal flaw -- instead of the tape being driven directly by a pinch-wheel (as per every serious tape deck including cassette) it relied on friction drive to the tape reel carrier. That meant that the speed of the recording would vary according to the ratio of tape on the take-up spool. Not crucial so long as the tape was played back on the recorder but potentially ghastly if transferred to another machine.
But for me it was the beginning of a lifelong involvement in recording -- with a Grundig dictaphone and then cassettes -- and graduating to a Ferrograph, Revox and Studer machines when making radio ads professionally.