People can roll tubulars all they want. The big advantage is you can run whatever pressure you want because the load on the brake tracks to contain the clincher bead is essentially non-existent. You can also run on a flat tire or really low pressure should it come to that.
This brings me to my next thought. With modern tubeless, you can get basically every advantage that tubulars offer with none of the heartache of glue, patches or novelty.
Tubular isn't even lighter than conventional anymore. I have a 957 gram disc braked tubeless wheel set.
957 gram tubeless clincher disc wheelset by
Richard Mozzarella, on Flickr
Nothing "wrong" with tubular though. Technology just moved on.