The 2021 Apple TV 4K may no longer be the latest and greatest set-top box in Apple’s lineup, but that doesn’t mean it’s a slouch when it comes to specs. Although it lacks HDR10 Plus and a Siri Remote that supports USB-C — two hallmarks of the third-gen model — it’s still plenty quick and supports Dolby Vision, Dolby Atmos, Wi-Fi 6, and HDMI 2.1 for TVs that support faster refresh rates over 4K. Plus, no matter which model you buy, you’ll be able to enjoy add-on subscriptions…