Well, I can't remember the last fight I had issues with, to be honest.
I guess it all depends on the provider, but mine has been spot on for quite a while now.
Because you're probably more of a casual fan that will just order the Big boxing / UFC fights, the AJ,Canelo,Pacman, Conor mcgregor, jon jones etc etc if people like that are fighting there will always be Streams up because of the interests / interactions with their service. Where as your Average UFC with Holly Holm as a main event or lets say Billy Joe Saunders for boxing, neither of them break 100K PPV buys and most streams site's couldn't care less if they go down, this is what im getting at.
i mean for 20£ a year you can't really go wrong anyway.