Android 4.3 was not a "big bang" release for new phones. It shipped on two iconic devices:
Furthermore, Android 4.3 has a unique distinction in the custom ROM community. Because it was the final version of Jelly Bean (before the visual overhaul of KitKat), it is considered the "most stable" build for many legacy devices. You can still find XDA Forums dedicated to running custom, debloated 4.3 ROMs on devices like the original Samsung Galaxy S2 or the HTC HD2 (the "phone that wouldn't die"). android 4.3 jelly bean
When Android 4.2 was released later that year, it brought useful features like multiple user accounts and wireless display mirroring (Miracast), but it was also plagued by bugs. Android 4