I had looked into protocols the other day but found no advantages over ABCs. In fact, failing to implement an ABC's interface is a 'compile-time' error, which is impossible to miss. Using protocols and mypy would be a soft-fail in comparison, where code runs but can fall flat at runtime still, if mypy is simply ignored/forgotten (it's optional).

I guess implementing multiple protocols (interfaces in other languages like C#) is possible and more awkward using ABCs?