Would fighters from previous era's have been even better today?

[SalimShady1212]

What is modern technology and strength and conditioning? CrossFit?

Think you need to go watch Rocky 4, bruv.

Lol, on a serious note that strength and conditioning along with supplements have vastly improved than back then. I am a biomed student so I have used a fair bit of tech which would be beyond comprehension literally 10-15 years ago.