A point about topsail yards is "what do you do with the .... thing when it is not set?"
There are those who will say "stow it along the boom in the lazyjacks" which is nice if you have points reefing and lazyjacks.
The merit of the yardless topsail is that it can easily be set over a reefed main and can (most important point!) be easily handed.
I practice, cruising, I seldom bother with the topsail.