From TheGamer: “In 2020, The Sims 4 celebrated its sixth birthday. This marked a milestone none of the previous Sims franchise titles had reached before their successor was launched. The Sims was released back in 2000 and The Sims 2 came along just four years later in 2004. This was followed by The Sims 3 five years on in 2009 and The Sims 4 was released after another five years in 2014. We are now into our sixth year of The Sims 4 and there’s still no official news of The Sims 5 being released any time soon.”
Source: N4G PC What The Sims 4 Needs To Survive in 2021