On an iOS device that potentially means erasing GBs of content (photos, iCloud Drive and app files, Safari bookmarks etc) and re syncing GBs of content from the new account. Over and over.

Not to mention potential criss crossing of accounts that happens. Heck my work phone still rings when my personal FaceTime get a call even if I completely logged out of my personal iCloud on the work phone (was a bad idea should never have experimented). No obvious way to fix that.

At some point all my personal iCloud photos showed up on my work phone due to a similar problem. That’s fixed now but I’m always worried it’ll happen again.

I’ll never login with a personal iCloud on a work device ever again.