OS1

To be fair, Corel's AfterShot is still available for Linux

I've been using Linux since RedHat 5.2 and ejected WinDOS for home use when they went anal about licensing with XP. My work laptop has been purely Linux for the past 12 years, and on and off for 5 years before that. We currently have one laptop where Linux doesn't support the webcam and another where Win 10 no longer supports the webcam. However, we have many more laptops that won't get a look in for Win 11, but they'll happily run Ubuntu 21.10. I've had to rescue many more WinDOS installs using Linux than the other way around. It's very jarring when I have an IT support task on a WinDOS machine, the clunky UI, the constant disk thrashing and the unfathomable settings! I installed a Linux WinDOS look a like on an old i3 laptop for video conferencing and just left it in the conference room, no one even realised it wasn't WinDOS! I thought there'd be howls of indignation, but there was nothing. That's the laptop where Win 10 no longer supports the webcam and one of the ones which won't get Win 11, but it'll happily run the latest Ubuntu complete with webcam. Fans of any OS will happily throw mud at other OSes, without bothering to get to grips with the other OSes. There are plenty of foibles in Linux, and which ever desktop you run on it, there are plenty in macOS, but there are also plenty in WinDOS.

I've been using Linux since RedHat 5.2 and ejected WinDOS for home use when they went anal about licensing with XP. My work laptop has been purely Linux for the past 12 years, and on and off for 5 years before that. We currently have one laptop where Linux doesn't support the webcam and another where Win 10 no longer supports the webcam. However, we have many more laptops that won't get a look in for Win 11, but they'll happily run Ubuntu 21.10. I've had to rescue many more WinDOS installs using Linux than the other way around. It's very jarring when I have an IT support task on a WinDOS machine, the clunky UI, the constant disk thrashing and the unfathomable settings! I installed a Linux WinDOS look a like on an old i3 laptop for video conferencing and just left it in the conference room, no one even realised it wasn't WinDOS! I thought there'd be howls of indignation, but there was nothing. That's the laptop where Win 10 no longer supports the webcam and one of the ones which won't get Win 11, but it'll happily run the latest Ubuntu complete with webcam. Fans of any OS will happily throw mud at other OSes, without bothering to get to grips with the other OSes. There are plenty of foibles in Linux, and which ever desktop you run on it, there are plenty in macOS, but there are also plenty in WinDOS.

Please don't overlook Corel's AfterShot. Not as high hitting as PhotoShop but a decent contender for RAW processing and photo retouching.

For video editing there's loads of choice from DaVinci's Resolve down but for DTP and photo editing the options seem to be far more limited. Personally I can get by with Corel's AfterShot for RAW pre-processing and GIMP, but I am not a professional.
This is a catch 22 situation.

The issue isn't really the money it's the support burden Serif would incur by transporting the app to yet another UI toolkit. (I know money is all wrapped up in that as well.) If like Babel, which is now Corel's AfterShot, or GIMP Affinity's products had been written with a cross platform UI toolkit from the start then most likely there would be a Linux version as well. But I suspect they are currently supporting two UI / OS versions and the buy in from the top for another one or to port to a cross platform UI toolkit just isn't there.