I was interested in the same question

Similarly to Penpot.app, Octo is web-based, but it’s designed to handle more than just SVGs in its canvas. It supports other HTML elements as well as HTML canvas, which allows for raster graphic editing and even video editing in the future.

The goal is for Octo users not to feel the need to still use Photoshop or Illustrator to supplement their work.

I am curious, what are your gripes with Penpot.app?

Great question, thank you!