Orion is a struggle on iOS. Despite it claiming to block ads, I find its ad-blocking capabilities heavily overstated - they barely work at all on many sites, even with all the filters enabled, and extension support doesn’t work with adblocking extensions making it a moot point. Right now Old Reddit is flooded with Samsung and other crap ads, even with all the lists turned on and updated.

Yes, and I think it's unlikely that it will support other platforms in future because it's based on Safari.

It’s coming on Linux (scheduled for March 2026). See https://kagi.com/changelog#6479

They started working on a Linux version this year. There are already WebKit based browsers for Linux so definitely it does not have to be confined to macOS.

Konqueror is among one of those Linux browsers, it became WebKit. It does not make a port easy though.

It's based on WebKit.