Larian’s Swen Vincke posted a tweet yesterday showing the game hitting 500,000 concurrent players, making it the third most played game on all of Steam He said that he told IT to only expect 100,000 concurrents at max.
Games this large and complex, with this many systems are always going to have some glitches. Overall this game runs great, and the vast majority of people have not had major issues afaik. Saying it's still "early access" because there is a glitch in it is just ridiculous.