It's fine when it's a non default option. Like use x.x.x.x for DNS, x.x.x.y for DNS+adblocking, x.x.x.z for totalitarian corporate blocklist that doesn't let you do anything fun
I believe cloudflare only blocked archive.is on their "Families" filtered dns. I've been using their normal 1.1.1.1 and haven't encountered any blocks.