This is kinda true. There are still insanely valuable big men. Jokic, AD, Giannis, and Embiid are all top tier players. Maybe they all aren't "traditional" but most all time players break the mold in some way.
Drummonds biggest problem is he tries to do stuff that he is not capable of effectively executing which ends up hurting his team quite a bit, no one wants that. This is how he ends up in the buy out situation. No team with assets or space has any incentive to add him to their team, he simply isn't valuable. If he limits his offensive contributions to finishing plays and offensive rebounding he will be much more of a winning player.
Don't short sell rebounding and beast in the paint. Please don’t disrespect Dre. I am so happy for him and his new teammates are happy to have him.