it's all hypothetical but I think people need to realise how much MMA has evolved and how much better fightera have become both with the skill level and athletic abilitiesI think the top guys today are generally better defensively than the guys Anderson fought. They have better head movement and understanding of striking.
Offensively Anderson is still superior to 99%. He'd have a lot of fun fights with all the strikers today.
Adesanya still outpoints him. I don't care if you think Anderson has more tools offensively. His tactics would not work in this matchup IMO. That's mainly because Anderson birthed him. That would be a super fun fight too.