You can sideload on Chromebooks if you enable developer mode. But enabling developer mode wipes all data on the system and displays a warning message on boot.
So Chromebooks only let you run software that a Google employee approved, unless you wipe your device to enable developer mode (which nobody, after using it for a while and then deciding to develop something, will want to do)? There is no other way to run some test code on it? I didn't know that and it seems strange (even Android is more liberal than that, and that's not a laptop) so genuine question.
I think wiping a Chromebook isn't as problematic as wiping another computer. The OS settings and apps can fully sync, and almost all apps autosync all data to the cloud.
Number of people gained on releasing a linux port is low, since most of them are existing customers. Thus the cost to port to a new platform is not justified.
Why not contribute a little every month to Krita so that it can hire more developers to work, if Krita has the budget of Photoshop, it would just blow it out of water.
PS: Right now there are 5 full time devs and 2 part time, :)
Not in the article body, but titled an article 'Linux doesn't have Photoshop' and then talking about something that isn't attempting to be Photoshop is really clickbait-y.