respectfully agree and disagree
I am no scientist or engineer, i could very easily be wrong on everything noted below. but IMHO:
dont know what the stretch is on the beals or eldrids, i believe the tendon's 36%, I think that's pretty high. the sterling is 30%.
I think that its better to get a good belayer than a stretchy rope, an overley stretchy rope makes it hard to judge falls and obstructions. a little slack can go a longer way. but yes stretch makes falls softer, but bigger isn't always better.
on TR, for me at least, its either a project that i'm too scared to try on lead or with noobs, for projects i don't want the rope too tight I want to learn the movements, resovle fear of unkwown etc... not have something acting as too much of an aid. And for noobs they don't like falling and dropping far. and I don't like pulling them up. its a climbing version of marx, the more one attributes to the rope (g-d) the less they attain for themself (paraphrased a while since i read the manifesto)
other issues i omitted, not corroborrated with science (don't know stats) but I think the tendon has a low sheath percentage and would be beaten to hell on my homes choss. I've beaten it to hell at my gym. this point may possibly prove wrong, I should jinvest 5 minutes and corroborate but eh i already bought the darn thing :)
that said, the guy who suggested the rope to me, used it outdoors and loved it. it does have a centre marker.
Again, this is my opinion based on little (read no) controlable science. so take it with a grain of salt.
happy and safe climbing and fun rope debating.