Comment by WhitneyLand

Developer learning curve: The context name is a good choice I think. Context API sounds much more elegant than global variables API.

While that’s a little tongue in cheek, the lifecycle method names I would rate as a drastic drop in intuitiveness:

Previous:

  componentWillMount

  componentWillReceiveProps

  componentWillUpdate

New:

  getDerivedStateFromProps

  getSnapshotBeforeUpdate