Yup. I never used any of the apps (always opened reddit through my mobile browser) so I wasn't affected that way. I am sympathetic to all the issues brought up, and I do really like the fediverse, but I don't think the users are here yet.
I like going to reddit to read about opinions or someone more knowledgeable than me talk about things. I find there's a lack of discussions in the fediverse at the moment for me, and maybe that's due to me having to curate my experience more. I don't know. But for now, yes, I still use it.
I mean, AI can be used to design a lot of robust yet efficient structures. In engineering and architecture, with enough data, AI can generate designs for buildings, and parts that are not only sturdy but can be built with less resources along with other design considerations. There's a really cool nasa video where competitors are trying to 3D print structures for habitation in space.
AI is also used in medicine to come up with new protein structures to create new medicine. It's also used in environmental sciences, to help predict earthquakes or monitor land use, etc.
There's a lot of practical uses for AI.