Haven't they also made RAM more important? I saw a tweet saying you can now have 3 apps at a time (split screen + one floating) but apparently this somehow requ

Haven't they also made RAM more important? I saw a tweet saying you can now have 3 apps at a time (split screen + one floating) but apparently this somehow requires 4GB of RAM. I find it hard to believe my iPad Air 2 couldn't do it just fine, but I don't think it has 4GB so apparently it's not allowed.