You can see the same thing in music recordings during the 60s. Stereo and quadrophonic sound was new so everything was panned all over the place really hard. Drums all on the left, vocals hard right etc. It's an interesting effect sometimes, but generally a gimmick and/or distraction. We don't really do that anymore, for good reason.
IIRC, the Beatles “Sgt. Pepper” album was among the first stereo-mixed albums released. As much fame as that particular album has, the original mix is really bad. Drums all left, guitars all right, nothing in the center. It sounds weird to modern ears!
Also IIRC, I believe George Harrison’s kid remixed it properly, just a handful of years ago.
Even worse is when they keep screwing with the panning. I can't stand Led Zeppelin II for that reason. Someone just couldn't stop messing with the damn slider, right in the middle of songs. The ones with merely bad, but static, panning are far more tolerable.
Because the analog equipment back then could only do binary panning.
I don't think we stopped doing it because it's gimmicky.
Recordings in the 1960s were mixed to be played back on stereo speakers. You can hard pan stuff and in your living room where you listen to it, it will produce a nice pleasant stereo image because each ear can hear some of both speakers.
Today, audio engineers mix music to be listened to primarily on headphones. If you pan something hard left, it's literally not going to be heard in the right ear at all which sounds horrifically artificial.
So now music has to be mixed to synthetize a pleasant soundstage when heard on headphones.