Welp, I'm on my iPad Air 2, and I had two tabs open: this forum, and
this web page. Two things happened:
1. The tabs reload when I switched between the two pages.
2. The first time I tried to reply to this thread, Safari froze when I tried to add the link above, wouldn't respond to anything. I had to force quit safari, respring, and then I was able to post to this thread the way I wanted.
Ironically, I don't ever remember having that bad of a problem on my Air, which my significant other now uses. And it didn't have a problem with reloading these two tabs.
I still think there's a bug in Safari. Having 2GB is a bandaid that gets around the poor memory management, in SOME cases, FOR NOW. But it's not the real fix.