In the context of PC gaming (particularly repacks), “Extra Quality” refers to a release that includes:
Forza Horizon 4 Ultimate Edition (version 1.478.564.0) is the most complete version of the game, bundling all major expansions and car packs. This specific version reflects a recent update aimed at service maintenance and fixing critical access issues for owned DLC cars on newer hardware. Included Ultimate Edition Content forza horizon 4 ultimate edition v14785640c extra quality
Later versions of Forza Horizon 4 (and the subsequent Forza Horizon 5) mandate a constant online check for the Festival Playlist. However, v14785640c is the last build where the Horizon Life (single-player) functions fully without a live server connection. You can still change seasons locally, buy houses, and collect cars without fear of a "disconnected from server" pop-up interrupting your drift chain. In the context of PC gaming (particularly repacks),