I made a similar decision when the increasing bloat of the web made my 3rd gen iPad inadequate. I considered the new iPad Pro, but decided on a Surface Pro 4 instead. Except for me it wasn't a real filesystem I wanted. It was a virtual memory system that didn't make programs discard data when multitasking.
On the iPad, opening a couple more browser tabs and then coming back to the original tab might cause the page on the original tab to reload. This could be very frustrating on sites like HN or Reddit. I might start typing a comment, and in the middle of that need to look up some things to fact check myself or get some references. Do that, go back to the comment--and the damn page reloads, wiping out what I'd typed so far.
Anticipating this, I could "select all" on my comment and copy it, then go do the research, and then come back. If the page reloads then I could just paste the comment back. If I needed to copy and paste something from the other page it was usually safe to do at that point. Just switching between two already loaded pages usually would not trigger a reload.
I never ran into anything like that on SP4. I could pause writing an HN comment and research in other tabs as much as I wanted, and never had the partial comment gone when I switched back.
I don't know if this is because Windows will use a pagefile and/or swapfile when there is not enough physical RAM for everything, or because the SP4 had 16 times as much RAM as my 3rd gen iPad so I simply never got it low enough on RAM, but for whatever the reason browsing worked a lot better the SP4.
Since then I also got a 6th gen iPad (not Pro). It's much better than my old 3rd gen was about this, but still does occasionally force a refresh when witching among tabs.