The market didn’t change instantly, and if we’re to believe there is significant demand one of the many models which did not switch first would have sold better.
> Replaceable batteries and lack of SD card slots is essential deliberately shortening the life of phones to get people to upgrade sooner.
Phone batteries are replaceable, but most people do not want to do it themselves so they go to the mall and pay someone else $50 - it’s still much cheaper than a new phone. The flip side, of course, is that sealed phones are far more durable so instead of the over-simplified narrative about planned obsolescence we have a more nuanced trade off where something adds desirable traits (smaller, cheaper, waterproof, more durable) at the expense of a feature few buyers used. I wouldn’t fault you for being on the other side of that decision but I just don’t think there are that many people who look for that when phone shopping. An iPhone easily lasts 5 years and is probably getting replaced for something like a broken screen, not a battery.
SD cards are similar: yes, the extra storage is nice if you don’t use cloud storage but most people do, and those people avoid the data loss which many SD card users have been hit by and have smaller, more durable phones in exchange. Again, I think both preferences are reasonable but one of them is a niche.