Despite all those talks about fun and interesting builds ...
To be quite honest roling stats is in my eyes mainly mean to get more than 15 in ability score right from the start.

O have tryed it on DnD beyond ... and it all depends on how greedy you are.
If single 18 satisfy you it take meerely few atempts of re-rolling.
Obviously the more you want the longer it takes.
But since there certainly WILL be people who will keep rolling until they get best possible results ... why not allow infinite point buy aswell? I mean the outcome will be the same ... so why not save some time?