Making me look up the source 😡

https://en.wikipedia.org/wiki/Ugly_law

Framework is the laptop designed intentionally to be fixed. They just came out with a big size version with a dedicated GPU since you mentioned CAD.

You don’t need a desktop for CAD anymore.

If it’s your livelihood then stick with Windows. If you need a little reliability then Ubuntu will have the most support. Otherwise, pick your flavor of Linux that you like most.

Browsers are chromium v Firefox. They will both get the job done. Chrome (google version of chromium) plays nicest with your google account.

As for answers, unfortunately you have to hit up multiple sources for any question. Usually ask a pc magazine, YouTube, and Reddit/Lenny and compare the answers while remembering their base motivations for providing answer.