Dang, I keep hearing this, and it has me

I just tie a danged old Uni-knot (some folks call it Trilene knot)
on everything - mono, floro, powerpro, fireline and never had any
problems with it.

About the losing fish with it, yeah - that is a real concern. I've tried
longlining jigs with it in the Spring (shallow) and when a fish came up
on top and started head-shaking, I feel like I lost some fish because of it.
Every time they shook, it was like you could just feel their mouth tearing...

A loose drag or soft rod helps, but I still dunno about it. It takes a little
more fiddling with planer board clips too.