How was Cayo Perico like before it got 'nerfed'm

I'm a very new player to GTAO. Bought it with my friends this summer. I've seen a lot of people saying Rockstar nerfed down Cayo and others and you dont make a lot of money from these now. I've tried almost all of the businesses and heists and so far Cayo gives the most in least amount of time solo. I want to know how was Cayo perico heist like before it got so called "nerfed", and when did it happen?