Inkscape has free-hand and raster tools, you can do masking and such. The GP mentions "in-place text editing" for which PS presumably uses vector methods. I use Inkscape pre- and/or post- GIMP for things like text layers.
I've long thought that a great graphics package could be achieved if Inkscape and The GIMP (or other primarily raster programmes) could draw to [different layers of] the same canvas. Inkscape lets you link in images which is a small step towards this.
I've been using it on and off since it was Sodiwopi or whatever it was called.
"Inkscape has free-hand and raster tools"
Yes, and Gimp has 'vector tools', so what? GP says "If you count inkscape as a 'photoshop replacement', it does many of the things photoshop/illustrator does" which makes no sense on all levels except the most abstract, like saying a pair of Nikes is like a Mercedes because you can use both to go from point A to point B.
Just consider it to have an implicit "for me" and I'll bet you'll find it hard to find a genuine objection that's worth making.
[PS: SodiPodi, me too]