I didn't catch that, thanks for point it out. Like another commenter said: this seems to be an in-place upgrade which is not advisable for major PostgreSQL ver

I didn't catch that, thanks for point it out. Like another commenter said: this seems to be an in-place upgrade which is not advisable for major PostgreSQL versions. Additionally, it looks like this involves restarting the cluster (downtime). The Database Migration Service looks like it wouldn't require downtime.