A switch away from US big-tech is great, but the switch should be made to something fundamentally better and more secure/privacy preserving IMO.
Not every single tool you might need will have a recommendation on this website, but some will and they're well researched and vetted alternatives that often perform better than the service you're replacing.
Yes but it also reopens everything exactly as you left it, meaning you can update and not loose anything mission critical; ymmv ofc but in my personal experience MacOS has the best update experience from mainstream OS