Photopea is a really impressive project, don't mean to diminish it in the slightest, but it's a toy next to Photoshop.

> exceeds CS6

I wish. It's not even on par with Photoshop 4. No LAB mode, handles only 4 profiles. I could be here all day listing missing features. Also, have you tried to open a 6GB PSB file with it?

I've used Photoshop almost daily since 1994. I really wish there was an open source competitor. There isn't.