שאלה | Why is developing machine learning applications considered time-consuming and challenging in relation to the past?

Why is developing machine learning applications considered time-consuming and challenging in relation to the past?

		Because machine learning basics are difficult to understand.
		Because achieving state-of-the-art performance is straightforward.
		Because design decisions in machine learning require little expertise.
		Because making design decisions is often non-intuitive and error-prone, requiring a lot of expertise, making the process tedious and time-consuming. Achieving state-of-the-art performance is quite hard.