Or buy the base model. Arguably the Air is stuck in the middle. While its a lot cheaper, it will loose support sooner. And while the base model will loose support earlier too, the base model will see less money being be lost.
Source on that please? It doesn't track with MacRumors:
iPad Pro, 12", 2015: Came with iOS 9.1, last supported OS was iPad OS 16 (released in January 2024)
iPad Air 2, 2014: Came with iOS 9.1, last supported OS was iPad OS 16 (released in January 2024)
iPad Pro 10.5", 2017. Came with iOS 10.3, last supported OS is the current OS.
iPad Air 3, 2019: Came with iOS 12.2, last supported OS is current.