Stable Diffusion has been easily locally installed and runnable on any decent GPU for 2 years at this point.
Combine that with Civitai.com for easy to download and run models of almost anything you can imagine - IP, celebrity, concepts, etc… and the possibilities have been endless.
In fact, with completely free apps like Draw Things on iOS, which allows you to run it on YOUR PHONE locally - where you can download models, tweak, customize, hand it images directly from your mobile device’s library… making this stuff is now trivial on the go.