In his book “Understanding Design Thinking, Lean, and Agile”, Jonny Schneider presents a key visual showing the similarities shared by today’s most prominent methodologies in product development; they are even complementary and compatible with one another:

Very good, and one of the simplest visualisations of the topic I have come upon so far. It can be considered a high-level version of Gartner’s plot (as published by the Gartner Symposium already in 2016):

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