I have read that article. Always makes me smile. They were a reference of their day. They are still pretty damn good in my book. They don't do everything perfectly but they were designed around classical music and they do a wonderful job with classical music, orchestra, organ, piano, any acoustic strings, horns and percussion. They were very well thought out for the purpose of listening to classical music. Any acoustic stuff is really good. Not as great for loud rock concert listening but I'm OK with that too. Not terrible at rock, just not what they were made for.
Lots more AR3's out there than 9's but there is a fair following for the 9's with many still in use today. The 9's like power and I biamp with two 250 X 2 @8ohm SS A/B amps. The difference between single amp to biamp is night and day. I've been listening to them for over 20 years and I do not get tired of them. Getting the Linn and a different cartridge into the system yesterday brought some new life back to the old classics. Most enjoyable. More improvements to make but having fun for now. Next up will be the SLP98, another classic to add to my system. Looking forward to it.