Digging around Macrumors with regards to OLED and Mini LED, I thought I'd revisit your post here. 0% for OLED eh? I'll give it 5%
Kuo has not been specific on what would be in a refreshed iPad Pro. But there has at least been one or 2 rumors about using OLED in upcoming iPads, and if Mini LED is expected end of 2020 or sometime in 2021, they could use OLED in the interim if they need to buy more panels from Samsung due to the shortfall of iPhone X / Xs / Xs Max sales. My main concern with OLED is that I imagine that bumping up the price by 2-300 more than it already has gone up between Gen 1 and Gen 3.
OLED display and triple lens camera along with A13X might give them enough to refresh (and hopefully a RAM bump as you mention, though they never really talk about RAM on stage-- maybe because it's not an impressive number to compare with competitors, even though the impressive part is that they do so well with so much less).
I also am not hopeful about entry level storage, knowing Apple-- I bet storage has come down in cost such that 128 is comparable to what 64 was when it was introduced with gen 2; but that doesn't mean Apple won't simply enjoy better margins on that part or use the less expensive components to offset whatever more expensive components end up in the refresh. (Drove me nuts how long they continued to sell 16gb iPhones-- way past the point where 16 no longer could provide a positive user experience for almost anyone).
I give 5G a 0% chance based purely on how quickly Apple is known to adopt new cellular technology. Hasn't had enough time to cook yet (let alone have infrastructure built out), IMO
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Yeah. I almost bought a 12.9 a few weeks ago because it was $450 off. And I'm sure I'd be totally happy with it. Mostly I'm playing the game of wanting an A13x so that I get the maximum length of usability out of the CPU. If I updated my iPads more frequently (I used to, before they went north of $1000), I wouldn't worry about it.