Will Tesla ever become mature, meaning they run out of major problems to solve? Their mission started out with sustainable transport, then broadened to sustainable energy. Maybe it will broaden again to sustainable living, on the home planet and others.
Elon wants to sustain human life ("the light of consciousness"), but said Tesla currently can't tackle some problems (e.g., electric aircraft) because their braintrust is too busy. That will change as transport and energy get solved and the braintrust of top engineers continues to grow (attracted by Tesla's culture), perhaps aided by Tesla artificial intelligence.
Plenty of other problems need solving to get our species off the freight train to extinction: climate change, soil depletion, ecosystem collapse, chemical pollution, global pandemics, toxic medicine and food production, biological and nuclear terrorism, poverty and violent revolution. Maybe by the time those are solved, the concept of dividends will be obsolete. If humans learn to share the immense wealth created by technology, and start taking better care of each other, your children might not need dividends or money as we know it. I can dream.