> [Edit] When I delete my account I'm going to lose old conversations, but that doesn't bother me anymore because I already recently lost them once when I switched from Android to iOS... WhatsApp has no way of keeping your history in that case. And otherwise there's really no friction to deleting an account, since you can always recreate it.

There are several third-party tools that allow to convert the history from Android to iOS. I recently switched and was able to keep all of my history.