They exist. Firefox and chromium are open source. Big companies pay their dev costs but they can be forked. Chromium is a descendent of WebKit which is a descendent of khtml from the KDE project. The engines have been open source for decades It’s the proprietary crap they put on top which is the problem.
It’s a bad combo in my opinion. The HDMI forum hates Linux so we mostly use display port. If you need HDMI 2.1 or higher for 8k I don’t know if it will work. It might end up with a really low frame rate. It is a crazy low end graphics card for 8k. That’s a low end 1080p card as far as games go. DRM is a problem with crappy companies like Netflix, so you will probably be watching upscaled standard def pictures. They must want us to pirate.
Waiting for Canonical to up sell proprietary utils features by subscription. Ubuntu’s regular release cycles were brilliant in 2004 when there weren’t a lot of alternatives but why does it still exist?