Yeah when I used some synthetic line with my Warn XD9000 it lasted for one wheeling trip.... The issue was the line speed, and the drum got extremely hot & the first and second row of line melted to the drum. Warn got a lot of complaints about synthetic line melting with the XD9000 so Warn came out with their own synthetic line, but it was nearly half the price of the winch.
After tossing 300.00 out for the first synthetic line I went back to my OEM steel cable, and as long as I use it properly, check for kinks, burs, and spray it down with water/WD40 after each use I basically never had to buy another cable. It does weigh a lot more, it can be extremely dangerous if not respected and used properly ( always place something in the middle of the cable to make it drop to the ground if it snaps), but for my use I'll stick with steel cable vs synthetic line.
They've advanced in the protection of the synthetic line and I hear it's not as UV sensitive as it was, but I'm still on my original cable on my Warn M8000 so until it dies I'm fine for now.