Looker Studio is fine until definitions start to drift
Looker Studio does one job very well: it turns Google data into a shareable report quickly and for free. Marketing teams connect GA4 or Sheets, build with drag and drop, and publish to whoever needs it. With a small number of reports and a single owner, there is nothing to model and nothing to maintain.
Trouble starts when reports multiply. Each one carries its own calculated fields and blended sources, so two dashboards can define conversion rate differently and nobody can say which is right. There is no shared model that reports inherit, which is precisely the problem Omni was built around.