Yeah, I mean, I didn't say anything about snow. I just feel like if you make a Bivy thread and someone reccomends a Notch, it's off-track. My OP is pretty clear. I'm getting two conflicting points of view; some people say eVent has the least condensation, and some people say Water Resistant materials are the most breathable. Nobody can back that up with anything other than opinion, which I already have in spades.
Maybe it's an unanswerable question. I feel like if I ask which down jacket is the warmest, someone has a chart with actual quantitative data, but ask about a bivy... and you get a whole spectrum of ideas, advice, chastising, etc.
I don't think I've added a single thing to the OP... Storms, blocking wind/rain under the tarp, breathable, bugproof. Not everyone is off-track but some people are.
Money is no object since the ceiling for a bivy is like $400. I'm happy to pay for a good bivy. What I can't do is spend $2000 on a multiple shelter system. Plus, on longer trips I need one setup to cover the spectrum.
I mean it when I say I appreciate the off-track stuff, I just need the on-track stuff more.
And no, I'm not selling my hammock. OP says, can't always use a hammock!