Yeah, same here: I upgraded to an FP4 about three months ago (from an increasingly-broken-down Samsung Galaxy S9), after puzzling for a while over whether I should wait for what looked like an imminent FP5 or just grab the FP4 that was available now. I don't regret my choice fwiw.
The battery already lasts two days under my usage model, and the phone still has a five year warranty and OS support for another three years. I see that Fairphone are still selling some repair parts for FP2 and FP3, so I expect to be able to repair my phone through that whole time period unless something weird happens.
The FP5 looks like a nice upgrade, but I don't feel short-changed: I got a new phone when my old one was failing, and it's not absolutely top-of-the-line, and that's fine. Like you, I'll think harder about the next round of upgrades (maybe to the FP6, maybe the FP7), and I'd love it if Fairphone were to be clearer about their release schedule, but I understand that they don't want to Osborne themselves.
I bought the Fairphone 3 a few weeks before the 4 came out, but was able to sell it for nearly the original price. I wasn't happy with it anyway (and the FP4 didn't have a headphone jack so I got an S10e second hand, which also works 10x better — I'm happy to make compromises on top of paying extra but there are limits). Maybe that works for you too if it's still good as new
Thanks for the overview; I've been holding out for the FP5, but am not sure yet if I'm going to buy that or get the FP4 at a discount (I missed the previous discount).
FP4 is also better at being €120 cheaper, and presumably €170 if they apply the same discount they did in April :) And I think it has dual SIM as well?
As much as I would like an audiojack, I doubt any smartphone will bring it back. If usb-c will be forced in Europe to all manufacturers I rather think if headphones might default to usb-c in the future as you could use them with any notebook and phones?!
I seemed to have missed out on:
* +22% increased CPU GHz
* ~40% increased performance on GPU benchmarks at same power consumption
* D̶u̶a̶l̶ ̶S̶i̶m̶
* +7% battery
* IP54 -> IP55 water resistance?
* And almost every other metric that I don't care much about e.g. Network, Display and Camera.
What's the F4 better at?
* Slightly smaller display 6.30 inch vs 6.46 inch
* ̶W̶e̶i̶g̶h̶t̶!̶ ̶I̶ ̶b̶e̶t̶ ̶t̶h̶e̶ ̶F̶5̶ ̶i̶s̶ ̶h̶e̶a̶v̶i̶e̶r̶ ̶t̶h̶a̶n̶ ̶F̶4̶ ̶(̶2̶2̶5̶ ̶g̶r̶a̶m̶s̶)̶ ̶b̶u̶t̶ ̶I̶ ̶s̶e̶e̶ ̶n̶o̶ ̶w̶e̶i̶g̶h̶t̶ ̶m̶e̶n̶t̶i̶o̶n̶e̶d̶ ̶f̶o̶r̶ ̶F̶5̶.̶
* No change in Audio jacks, both seem to still have a single USB C connector.
I guess I'll just suck it up and wait for the Fairphone 6 or potentially Fairphone 7 in 5 years.
EDIT: Two corrections. I wasn't aware F4 also has dual sim. Apparently F5 is lighter at 212 grams.