To be honest I don't know the relationship between breaking strenght (static) versus under shock load, but I'd imagine directly related. I found a fair bit of reading a while back on the topic of comparing materials in the context of rope, marine applications. Seems like I read Dacron stretches 5% compared to the HMPE stuff closer to 1%-2% as a function of breaking strenght (eg. size). They are all about stretch, shock load too, I'd be surprised if that testing didn't get done as well.

You make an excellent point about work fatique. Linen suffers from this, as you describe typically at the nock point. And I read with interest your thoughts about Vectran (I think, aka 450+) being particularly brittle.

I don't shoot enough to be overly concerned with plain durability. I've had two strings on that bow I bought from you (what 6 - 8 years ago). But risk of failure from calamity, intimacy with broadheads is certainly a legit argument.

I don't favor skinny strings, unless it's for a tiny little bow like wife or dotter. But I don't begrudge them either. I think folks generally delight in doing, proving from their pov, they can do what they've been told they can't, hence the brag, although it might be more tactfully label "enthusiastic sharing of information." ;-)

I like FF-like materials for the low noise, low handshock. In the selfbowyerin game it can be quite dramatic, the difference. And also in that game having even just a few fps more cast counts for a lot, since in effect you use up your bow, like a battery, with every shot. The more "overbuilt" it is the longer it lasts sure, to the point it's not necessarily relevant. But the more wood you sling (being overbuilt), the slower the bow, the more the handshock. It's a match made in heaven for selfbows.

I'm the kinda guy, although I got my wings clipped a fair bit lately, I got two speeds: off and fast as is legal. I'm the last person to leave performance on the table for a promise of a relatively insignificant amount of longevity. I've shot that Kings Pawn for what, 6 - 8 years, almost exclusively and if it blew up today (I've been rough with it, and modified it a fair bit), I'd feel I got exceptional value. It's had two strings on it, your d97 which is my backup string, and a 450+ (8 strand) I made maybe 3 year ago. I didn't like it with FF. If I'd had a spool of d97 I'd a put back on it. The idea of using B50 for anything but string puffs just doesn't enter into my thinking.

This is why you have so much differences in opinion on this topic. Folks have a wide range of expectations, experiences, knowledge, requirements, what-have-you.