OMG! Just “upgraded” to the new, improved iOS v18.5 on our iPhone13minis and it is absolutely life-changing. Battery lasts three days now, all apps are near instantaneous in their performance, Siri actually works, I lost weight, no longer need therapy, life is amazing!
Back IRL, 18.5 seems to be a big nothing-burger. Didn’t even find the new wallpapers under the Settings - Wallpaper. Maybe just some internal bug fixes and stuff that bolsters security both of which are okay in my opinion. Set your expectations low.