I have an iPhone, iPad Pro and Mac Book Pro, and have 2 Terabytes of iCloud storage, ticks the “just works” box. It automatically tides stuff off the various devices to free up local storage, and means that documents are available across devices. It also ensures that they’re all backed up all the time, so can be restored easily if needing replacement or significant servicing.
I have an iPhone, iPad Pro and Mac Book Pro, and have 2 Terabytes of iCloud storage, ticks the “just works” box. It automatically tides stuff off the various devices to free up local storage, and means that documents are available across devices. It also ensures that they’re all backed up all the time, so can be restored easily if needing replacement or significant servicing.