If you’re on modern hardware and iOS, skip it. But if you’re keeping a 2008-era media PC alive or syncing a classic iPod, iTunes 10.6.3 is still a reliable workhorse.
Despite these performance drawbacks, 10.6.3 on Windows was a powerhouse of functionality. Unlike modern streaming apps that act merely as gateways to subscription services, this version was a comprehensive database management tool. It allowed for granular control of metadata, sophisticated smart playlists, and a DJ mode that was surprisingly powerful. For Windows users who had organized terabytes of MP3s, AACs, and ALAC files, iTunes 10.6.3 was the cockpit from which they piloted their digital audio collection. itunes 10.6.3 windows
If you're already using iTunes on your Windows machine, there's no compelling reason to upgrade or downgrade. However, if you're new to iTunes, I recommend giving it a try. Just be aware that it may not be the most lightweight or customizable media management app out there. If you’re on modern hardware and iOS, skip it