To help you decide which generation of ARC technology is right for you, this is HDMI eARC vs. ARC, the definitive breakdown.
HDMI ARC and HDMI eARC: everything you need to know
HDMI ARC and eARC: Unlocking the Difference
What Are HDMI 2.1 ARC and eARC Cables? - Dolby - Dolby
What are HDMI ARC & eARC? – Devialet Help Center
What is eARC and how does it compare to HDMI ARC? - SoundGuys
What's the Hype About eARC? The Only 4 Things You Need to Know!
What is HDMI-eARC/HDMI 2.1 and How Does it Differ from HDMI-ARC? – Klipsch
HDMI ARC/eARC: the one-cable TV audio tech fully explained
HDMI ARC and eARC: Audio Return Channel for beginners - CNET