I loved Snow Leopard. If they make an iOS version, I may get an iPhone 6S and never upgrade it, lol. For what I need, iOS on iPhone is mostly feature complete anyway.
How likely is it that we would get RAM compression on iOS? I don't have an understanding of how it works at a lower level. Does it require a lot of processing power? That would make an iPhone 6S with 2GB of RAM 3GB, which would be pretty freaking fantastic.
I wish that iOS upgrades went like this:
Cycle 1: 50% design, 25% features, 25% performance
Cycle 2: 50% features, 25% design, 25% performance
Cycle 3: 50% performance, 25% design, 25% features
I could also argue that services could be added to this cycle, because they generally need a lot of help. A four year complete cycle seems kinda long though, so you might include that with features. I think we're to the point where most new features will be service-based anyway.
This three year full cycle would help keep things fresh (design), useful (features) and running well (performance). Each cycle they would give more focus to one of the three areas to thoroughly address areas that need it the most.
Generally with software, the more feature bloat you have, the better you have to design the system to accommodate the extra features to make it less confusing. Adding features can also lower performance, so having a cycle structured like this makes sense. In practice I understand that it won't always work out that way, but it would be a better guide to follow than what they're doing now, which is to completely overhaul design one year, add a ton of features the next, and then fix all the bugs the year after that. Because meanwhile the buggy system gets really annoying to deal with, and when you do a complete design overhaul people get pissy. If they had more gradually shifted towards flat design then people would have more easily accepted it. I don't get the all-in or all-out approach that they take. I know iOS 7 added features, but both iOS 7 and iOS 8 releases were buggier than the last. Then there's things like iCloud Photos that needs some help. I think just refining their process would make things better over time.