Yellow Line........the 1980's are calling! The real
issue is what does the line look like under water. If you are fishing shallow, clear water for bass they will be cautious on sunny days and yellow line won't help. If you are fishing murky water with bait or jigs and line watching helps you spot light bites, yellow can be good. It's good for working a bait slowly on a drop and all of a sudden the line goes limp sooner then expected, a fish may have caught it mid drop and is just sitting there with it. If you don't react and set the hook, the fish will spit it out before you set the hook. Also if a fish hits swimming up you can see the line react to that and set the hook. These are all light bite scenarios or a fish moving in a direction that creates slack line between you and the bait.
In 40 years I used yellow line once, it was Stren and I think it was free. There are hi vis lines that are not hi vis under water, just above.
issue is what does the line look like under water. If you are fishing shallow, clear water for bass they will be cautious on sunny days and yellow line won't help. If you are fishing murky water with bait or jigs and line watching helps you spot light bites, yellow can be good. It's good for working a bait slowly on a drop and all of a sudden the line goes limp sooner then expected, a fish may have caught it mid drop and is just sitting there with it. If you don't react and set the hook, the fish will spit it out before you set the hook. Also if a fish hits swimming up you can see the line react to that and set the hook. These are all light bite scenarios or a fish moving in a direction that creates slack line between you and the bait.
In 40 years I used yellow line once, it was Stren and I think it was free. There are hi vis lines that are not hi vis under water, just above.