What does ChatGPT have to do with this…? This is what FP themselves say https://support.fairphone.com/hc/en-us/articles/9836188988049-Audio-Jack-3-5mm
I have a FP3 with a jack, for reference. It doesn’t have an IP rating. FP4 has IP54, FP5/6 both have IP55. Also yes, phones have become bigger, but they have more stuff inside. More cameras, for example.
I mean, the jack is literally a hole in the chassis of the phone, while I cannot exclude the fact that someone managed to make a design with good IP rating, I can very easily see that it makes it much harder.
In the video scheduled to be posted on YouTube apparently there were more elements (talked about their own dressing style and not feeling either a man or a woman - according to some articles which translated the pages in russian).
I think this is overall irrelevant anyway. In their manifesto they go all over the place ideologically, from holocaust praise to trans rights, apparently. It’s not like there was a consistent motivation behind, they were clearly unwell mentally - reporting depression and suicidal thoughts for years - and did the shooting to be killed.