I love DuckDuckGo but Apple needs to invest a lot into it if they want it to be anywhere on par with Google. I use DDG primarily as much search engine on all my devices but the lack of customization in the search input and the fact that the results are objectively worse than Google's for the same terms means I find myself using Google often enough to where I think this is a bad idea for most users. I say this as someone who really hates Google's data and privacy stances and who has to reluctantly admit that their tool is simply better for the job.