Rather rude tone to take for a reasonable question.

You do note in the article that you are locking at Android 16 - so the cost of following this guide is no security updates thereafter? That is a rather high cost (IMO immediate disqualifier), it is reasonable to discuss it and I don't see why you think it appropriate to rudely dismiss it.

Its great that you use the phone only for the camera. But you decided to post this as a guide and people who use their phones as a general-purpose device might be interested in discussing it too. The specificity of your particular use-case is nowhere visible in the article.