Interest of an "Images on the fly"-service?

Hello community, this is my first post here and hopefully one of many to come. A one liner about me; Web/Growth/Entrepreneur-hacker as the rest of you. At the moment Im fulfilling my pursuit of having multiple income streams with micro SaaS-services. I have promised myself to finish one project at a time, and now when I am about to finish one off, I got into thinking "Maybe someone else would like this as a product?"

So my quick question to you, before digging into it too much - are there interest out there to have a lightweight S3-bucket "assets/images"-on the fly service where you easily can upload your assets (images) and have them manipulated through the URL to the asset (I know, there are plenty out there, but have not found anyone this simple).

Im thinking, Easy upload assets to your own S3 bucket, connect my service, connect your subdomain ("staticimg.yourdoman.com") followed with a specific folder structure that will determine what will happen to the image.

"staticimg.yourdomain.com/200x200/image.avif" (This will grab the original uploaded "/image.jpg" image, crop it to 200x200 and then convert it to avif) and lastly serve it through a DNS with cache and all.

Or do you think this is just a waste of time? For me, and my projects, this is a time and life saver so I though, maybe someone else might want one too?