iPhone 5s-------------September 2013
iPhone SE-------------March 2016
iPhone 8---------------September 2017
iPhone SE 2nd gen----April 2020
iPhone 12 mini---------November 2020
iPhone SE 3rd gen------March 2022?
No way Apple would use a design, that is a little over a year old, for a budget phone.
I can't stand how people always make these wishlists for the SE instead of thinking pragmatically about what it's almost 100% sure to be based on previous iterations:
If SE3 launches in 2022 or 2023, then there's absolutely no way on Earth Apple lets it get the 12 or 12 mini body. The 12 and maybe the 12 mini will probably still be in Apple's lineup in 2022 and 2023 so there's no chance they're will also be a cheaper SE with a newer A15 chip in it, NO WAY.
Well, I actually think the 12 mini will be phased out come September 2021. So the line-up in Q1-Q2 2022, post SE3 launch, will be(in order of lowest to highest specs/prices:
SE3, 12, 12s/13 mini, 12s/13, 12s/13 Pro, and 12s/13 Pro Max.
The SE3 will also most likely
not get Face ID since Apple didn't even put it in the iPad Air. It might get the Xr/11 body and edge-to-edge LCD display. But probably not Face-ID opting instead for Touch-ID on the side button like we have in the iPad Air.
The SEs are just as much a tool to make you understand the value of Apple's more expensive flagship models, and Apple's flagship from last year @$499, as it is its' own product.
Apple is never going to give the SE a unique, contemporary design or unique features that can't be found with better specs in more expensive iPhones.
Apple reusing the 5s or 8 designs once more is equally unlikely since they've never done the same body for the SE twice and it would also make the SE3 look like too small of an upgrade from the 2020 SE.
My best bet is an 11 body and display paired with an A15 and other new internal features, but lacking Face-ID and using Touch-ID in the side button instead.
Stop wishing for killer features from the $399 iPhone. It's the old design from Apple's last iPhone cycle paired with a couple of newer specs:
That's the SE formula, nothing more, nothing less.