Maybe it’s their lineage, but I appreciate most native, first party iPhone apps having local first data storage. 4G is increasingly spotty in my area and it’s a crapshoot whether I can reliably load a time sensitive app that requires remote data in some areas. Throwing something in Notes, Photos, or Wallet always works, though. I’m not sure why I still can’t have my full mailbox on my phone, but at least there are several local options.