1. GA4 has a more sparse and minimal (and yet somehow more complicated) user interface.
2. GA4 has deprecated some of the data we were able to see in Google Analytics Universal.
3. The removal of historical data.
4. GA4 does not allow additional ‘views’ whereas GA3 allowed a ‘filtered’, ‘test’, and ‘master’ view.
5. Reduced e-commerce tracking.
6. Reduced (aka almost non-existent) options in attribution reports.
Why should I migrate over NOW rather than July of 2023?
1. Being able to compare data collection accuracy between the 2 versions.
2. Learning the different measurement models - labeled sessions and pageviews (GA3) vs events and parameters (GA4).
3. Creating a year’s worth of historical data within GA4.