Thing B doesn’t need to be a superior alternative to thing A to be worth learning about. It just needs to be useful. Even potentially useful.
F# doesn’t need to be “better” than C# for it to be worth my while to learn. Maybe it’ll be a better way to solve a particular problem. Or maybe it’ll just bend my perspective in some interesting new ways, which might make me a little better at understanding and solving problems in general.
Functional patterns don’t need to be “better” than OO patterns to be worth my while to learn.
Kanban doesn’t need to be “better” than Scrum to be worth my while to learn.
React doesn’t need to be “better” than Angular to be worth my while to learn.
And so on.
