Gap Tape? Electrical OK?

I know that this is going to generate a long thread but --- what is so
great about $10/roll super thin, super flexible, super-wide gap tape?

I had it in my mind once that thin was the important part to prevent
seperation of the laminar flow or something equally distructive.
However a friend of mine made perfect sense when he said that this
would only affect performance if it was cross-ways to the air flow.
Obviously the wing root seal tape is not cross-ways.

Maybe the adhesive is distructive to the gell coat? If you left the
tape on all season I could see that this might be a factor but we
generally only leave it on for part of a day. 3M tape's adhesive is
good but not like duct tape or something.

Let's me know what you think.

- John