itsWow_gamr The version for GrapheneOS that was available for the Google Pixel 2 is a far cry from the current versions, they have almost nothing in common, the version for the Google Pixel 2 isn't available and even if you did find it, you'd be missing out on a whole host of features and improvements to form a real opinion of GrapheneOS.
To try and reassure you, GrapheneOS is the easiest mobile operating system to install and you can revert to the original operating system at any time, in terms of user experience it's the same as Pixel OS with significant security and privacy under the hood, so you don't see it, as well as some slightly less important user-side security and privacy features that you don't have to use but are great to have. I'm using the Alpha channel and it's perfectly stable, problems are fixed quickly, I'll skip the testing phase and get a recent Pixel if you want GrapheneOS.