The 17 was a good step up, but it's hard to cheer for finally getting a 120Hz display, while 300-400 Euro Android phones had them for a few years already.
The iPhone Air was the only really interesting model. But with only one camera and high introduction price, I don't think it was a failure in the market. Samsung had a similar problem with the S25 Edge - fewer cameras, but priced near the Ultra (the Air/Edge are a steal at the current pricing of 880/520 Euro, if you can live with the battery life).
I'd love to see more actually meaningful features. While the Samsung privacy display of the S26 Ultra may not have been perfect the first iteration, it's a innovative feature that is useful to a lot of people. (No, a privacy screen protector is not the same, I want to see most apps with the full flagship display glory.)
Another issue is that the pricing barely gets reduced over the year, while you can already get an S26 for just over 600 Euro.