After the recent Summer Games Fest, Street Fighter 6 has once again entered the spotlight with their unexpected Season 4 announcement. Obviously everyone knew that Season 4 was happening, but nobody, absolutely nobody could've predicted the sort of line-up that Capcom had cooked up for the game's next year.
While many classic characters are still waiting for their moment, Season 4 offers only newcomers (even if we already knew one of them from the story) and one guest character from Final Fantasy 7 – Tifa Lockhart.
The developers have since explained this in several interviews, pointing out that the current Street Fighter 6 fan base is surprisingly young, with over 70% of players being in the 15 to 25 age bracket. To those players, these entirely new characters are a welcome addition compared to legacy characters that they don't really have a connection with.
Similarly, in their review with IGN, Shuhei Matsumoto and Takayuki Nakayama revealed that the talks to collaborate with Square Enix started a long time ago. The two actually have a common friend who loves Street Fighter 6 and worked at Square Enix, so they started thinking of a potential collaboration.
This eventually settled on a guest character, with Tifa being the most fitting choice as a martial arts focused character. They also mention that the whole conversation began 3 years ago, which would mean it took place around the release of Street Fighter 6. Even though it doesn't mean Tifa was necessarily in development all that time, we do know that characters take a very long time to make, so it's likely that some work had already started once the deal was settled.
Matsumoto also mentioned that he's like to have Street Fighter 6 running for as long as possible, though for now, they seem comitted to the 10 year life cycle and are working hard to improve the game. The reaction to this has been somewhat mixed. On one hand, if you love SF6, it's great to know that they plan to keep supporting it. However, the cadence of content releases and balance patches has been exceptionally poor so far, and with World Tour no longer getting update, it has people questioning Capcom's actual committment to the game.

