You can't tell anyone they're dumb for their preference of headphones. It's a personal choice.
For the 800s, if you don't mind the treble spike, then they're still one of the best bargins in flagship headphones. Also, if you're willing to mod them slightly, they can sound almost as good as the $4000 Utopias, with almost no spike at all.
I've owned a modded pair of 800's for a few years now, and have access LCD-X's and Elears, as well as friends that have LCD-3's, Utopias, T1's, and one person with a modded SR-007 setup. After listening to pretty much all of these, the only one that could touch the clarity of the 800's were the SR-007's, but I couldn't deal with the sound-stage and having to have a dedicated amplifier. The Utopias were very pleasant to listen to, but lacked that extra engagement that the 800's provided.
For technical accuracy and sound-stage, the HD800 is still unmatched in the sub $2000 category. That's why every reviewer on the planet included a comparison to the 800's with any flagship they review. It's very much still relevant.
P.S. Tho only change with the 800S is added bass (with added distortion) and a removal of the 6kHz spike. They basically just adopted an existing community mod in official capacity.