I understand the Pound for Pound concept well, but even still I don't get how people don't have Jones #1.
He fought far better competition than anyone else, for a far longer period of time, with just as much dominance as anyone else. He just came back from a three-year layoff and dusted the #1 Ranked HW and former interim champion like it was childs play.
There comes a point where the extension of dominance is so great that he literally has to lose before you take it from him, he is just far more proven than anyone else. Even if you say X fighter could beat 2023 Jones hypothetically, the reality is no one has shown the Chin, Grit, IQ, ability to adjust, durability that Jones has for this period of time, he is by a good margin the greatest fighter in MMA today and that's crazy to say considering how great MM and Volk are in their own right.
It's utterly insane for Jones to have never been officially knocked down his entire career, despite fighting in the most power heavy divisions for 15+ years at the highest-level. people can criticize him as a person, but as a fighter he is objectively better than anyone else, even in 2023 he should clearly have the throne.
Everything after the top 4 or so PFP is just based on how much you individually are weighing recency, skill set, resume, etc.
For me it's weird to see Alex below Sean on the UFC PFP list, but I'm not oblivious to the fact Sean has been dominant at MW for a very long time. It does seem like complete BS to see Suga Sean at #6 considering many believe he lost the Yan fight. His PFP argument entirely rest on the Yan and rounds fights, and because the Yan win was controversial and the Aljo win came after Aljo literally just went 5 rounds three months before it seems premature to say there are only 5 better fighters in the UFC. Anyone can have a bad night in MMA, so I tend to weigh resume and longevity a bit more than most it seems.