A lot of shows get renewed prior to the commencement of a new season. It often generates buzz and lets viewers know that they aren’t going to start watching a show and then it be cancelled without a resolution.
Despite what all the Disco haters say, the show is going well and has been huge success. One of the top 3 most streamed tv shows worldwide last year. It’ll continue to be the flagship Trek show for the foreseeable future.
As I’ve said in one of the other threads, I genuinely expect Discovery to run for a full 7 seasons, like traditional Trek shows. It may not air a season every year, like the old days, especially when they have a full roster of different Trek shows to cover a year, but it’ll still reach that 7 seasons milestone. As we’ve seen so far, each season so far hasn’t aired year fo date (S1- late 2017 to early 2018. S2- early 2019. S3- mid 2020.).