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Depends. How often do you fish?
Tying stright on is fine but the advantage of having loop-to-loop is quick changes to other leaders.

I rarely use indicators as can be a pain, by causing too much...

Never had a single one fail...ever. So pretty good!

The only small issue is that, over time, casting flex will cause the flyline to crack just behind the plastic cover. To prolong this I use UV...

Yeah, just put a pre-made braided loop on it. Sorted!