I personally think ground fighting is more effective on the street. I used to box and got my ass handed to me by a wrestler in a street fight. After that I got into jinjitsu training for a couple years so at least I am adequate on the ground. Lol, kinda funny though, Ive only been in 1 fight in the last 10 years, not like I really need it.
At the amateur level, if you can at least slip a punch or two you can take it to the ground. At top levels they are such deadly strikers that it changes the complexity and strategy a lot.