Becoming obsolete does not make a product bad. My Phase Linear 1000 Autocorrelator was a necessity back in the days of tape, but not needed in later digital times.
Now this post got the old memory bank a twirling.
In the peak of my Vinyl days, I would buy and immediately record albums on a 10.5 inch TEAC A-3300SR (? - I should ask my brother about the model as he bought this from me and he's still got it) Auto-Reverse Tape Deck via my Marantz 2325 receiver (sometimes using the 2325's Dolby section). I was always searching for ways to improve the recordings and playback. I was convinced by a salesman in a local audio store (long gone A&B Sound) to buy a Phase Linear 1000 Autocorrelator. I did bring it home, but it didn't really impress us much, so I returned it within the 10 days (or a week - whatever was allowed back then).
I actually bought a
DBX 3BX in the same period and it too made the round trip back to A&B. I really wasn't the type to buy and return stuff, but money was tight as I was a starving student (with an expensive hobby) and only wanted to add equipment that gave real value to my system.
I was able to avoid the wrong side of the Beta - VHS wars, but my brother made the wrong move and had 2 very expensive Betamax machines (I bet he still has them!) Similarly the Blu-ray => HD-DVD decision was easy, as we bought a Sony PlayStation (for the games for the kids) and couldn't afford a separate machine for Movies; especially when it played Blu-rays. By the time we could, that war was over and Toshiba's HD-DVD had lost. (One of the few wins Sony had as I remember.)
I really don't know why but I was into 3D TVs and because they were about the same cost as a regular TV, I bought a couple when we needed a new TV. One of my sons liked to watch movies in that format once in a while. Those Samsung TVs still function but we haven't used the 3D Glasses in ages.
I guess we all make a poor choice from time to time, but I keep trying to limit mine.