I use 40 lb SB on my Stradic 5K - works ok. I notice I do get more "wind knots" w/ it, but I attribute that to user error - I'm throwing light lures in moderate surf. I tie direct w/ short section of fluoro and don't use a swivel.
The Stren Braid came out this year - not sure why they would discontinue it so soon. If you like it that much buy a few extra spools and tuck them away - braid never goes bad.
I do miss the Whiplash in 30 lb.

That stuff was SO thin - any one got some they want to trade me?

If so please pm me.
Mystery breaks IMHO are those damn "wind knots" that you can't always see/feel and when you wind up to launch it the line basically cuts itself. I have had it happen with just about ALL braid especially when I can't keep good tension on the line when bring it back in.
Conventionals will work w/ just about any braid. It is the foolish spinning reels that create the problems. Folks compain about it, but leave out the details at times. WTF do I know - I've tried just about every major braid on the market and don't rave about one over another. I haven't tried the store market brands sold thru big names online - rather buy it local and support the little shops.