RRTConnect vs asym. optimal planners

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It appears that the most popular recommended OMPL planner for moveit is RRTConnect, it is the recommended planner on the UR arms(from glancing at github posts).

Is there a reason that RRTConnect is good enough when it doesnt converge on an optimal solution(like minimize distance)? Or is it the case that in practice, it rarely gets outperformed by planners like RRTStar, LazyPRMStar, etc? Whereas the latter pay a price with high computation time?

I'm on noetic now, and that now support OMPL 1.5, which has a more planners available. Are there even better planners to use now if my goal is:

• -fast planning

• -minimize joint motion