Act as a senior software engineer with 10+ years of experience in object-oriented programming. Explain the key differences between abstract classes and interfaces in [LANGUAGE], focusing on their use cases, limitations, and best practices. Provide concrete examples for scenarios where an [ABSTRACT_CLASS] would be more appropriate than an [INTERFACE], and vice versa. Also, discuss how multiple inheritance and default method implementations affect this decision in [FRAMEWORK]. Your explanation should be clear enough for a junior developer to grasp while offering insights that even experienced programmers would find valuable.