For Photoshop specifically (and perhaps other CC programs, but I'm less familiar with them) another problem compared to alternatives is that a great wealth of instructional material (tutorials, paid video courses, etc) are built around Photoshop.
While there are ways to make alternatives more Photoshop-like, there's always going to be unreconcilable differences which bring unwelcome friction when the goal is to learn whatever the material is teaching rather than screw around with keybinds and UI configuration.
More projects that aim to adjust existing FOSS alternatives to more closely clone Photoshop would be of great help here. There used to be GIMPShop[0] that did this for GIMP but it's unfortunately been defunct for a long time now.
While there are ways to make alternatives more Photoshop-like, there's always going to be unreconcilable differences which bring unwelcome friction when the goal is to learn whatever the material is teaching rather than screw around with keybinds and UI configuration.
More projects that aim to adjust existing FOSS alternatives to more closely clone Photoshop would be of great help here. There used to be GIMPShop[0] that did this for GIMP but it's unfortunately been defunct for a long time now.
[0]: https://en.wikipedia.org/wiki/GIMPshop