Points 3) and 4) are good if you are looking for generally interesting stuff, but don't help much when searching for specific topics as I described. 2) and 5) would probably be an interesting project but way too much effort for just searching something to read myself. 1) is probably good advice but doesn't solve the problem of initially finding something to read.
The problem with such things is that you would need 100% accuracy in most cases for it to be useful.
For example many schools and universities fear that students use ChatGPT for homework. If such a plagiarism checker has false positive results in just a small percentage of cases, the consequences for honest students would be too severe to actually act on the results of the check. But perfect accuracy can never be reached for text classification, so those tool will never be that useful despite being interesting to AI people.
While this seems to be a good idea judging by the lots of positive comments here, I personally don't get the appeal of using an app to do breathing exercises or meditate. It is such a simple thing to focus on yourself with eyes shut, do some counting in your head without any need for an external device that tells me what to do. For me, the beauty in such exercises is that I can do them anywhere, without any equipment. Having yet another app for this just doesn't feel right, even though it might be somewhat useful to learn new techniques.