I’ve always had a hard time switching from Google to any other search engine because the gap on quality. But since last year, Google’s results are getting worse and worse but on the other hand I have found DDG to be quite satisfying. So maybe their results have changed, but for me it was for the better.

You do you, it can’t hurt to reboot and work on a fresh restart. But if for some reasons you need to keep your machine up, you’ll know it is less of a problem than on windows typically

Unless you’re updating the kernel itself, there is little chance you actually need to reboot your machine. Just restarting whatever service or application you’re using should do the trick.