Technically, you don’t need Google Analytics 4 (GA4) to measure your holiday sales efforts this season because Universal Analytics (UA) is still active.
However, next year at this time UA will no longer be tracking data and the individual accounts will likely be permanently shut down and closed sometime around January 2024.
From next year on, the only analytics data you’ll have (from a Google-owned analytics platform, anyway) will be from GA4.
