Electric vehicle maker (NASDAQ: TSLA) has pursued full self-driving (FSD) technology for years. While it's not there yet, the company seems to have gotten closer based on its optimism on version 12.3 of its FSD software.

It's a big deal, because Tesla's opportunity to implement FSD software in multiple ways, from licensing to robotaxis, has long been a critical pillar in a long-term investment thesis.

How is FSD different from past versions, and what hints does Tesla give about its confidence in the technology? More importantly, does this development make the stock a buy? Here is what you need to know.

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Source Fool.com