Yup. Tesla sales growth has plateaued.
Not quite. Pick the current quarters on that graph, and count back 4 times to the prior year, and see massive sales growth. The growth continues. Even in California, where the Fremont factory sold their 3 millionth car produced there. That's a lot of EVs, and their competitors in the USA can barely compete with that single factory in Fremont. Tesla is building more factories, beyond the others in Texas, China, and Germany; currently building one in Mexico with others planned for Indonesia, India, and potentially a couple other countries (in the Middle East). They wouldn't be building unless they're constrained by vehicle production for waiting buyers.