Coinbase, Grayscale, and the SEC regarding the proposed Ethereum ETF. It's an important development that could have significant implications for the crypto industry if approved :

1. The fact that this meeting took place indicates the SEC is seriously evaluating Grayscale's proposal. Having representatives from major players like Coinbase present arguments highlights the importance of this potential ETF approval.

2. However, as you mentioned, the lack of official feedback from the SEC so far means the outcome is still highly uncertain. The SEC has historically been very cautious about approving crypto ETFs due to concerns around fraud, manipulation, and investor protection.

3. If approved, an Ethereum ETF would be a huge milestone and could open the floodgates for more crypto ETF products. This improved accessibility could drive greater mainstream adoption as you noted.

4. Regulation and oversight are critical for the mainstream embrace of crypto assets. An SEC-approved ETF would provide investors with a regulated vehicle to gain exposure to Ethereum.

5. Even if not approved this time, the continued dialogue between industry and regulators is positive. It shows both sides are committed to finding a pathway for safely integrating crypto into traditional finance.

This is definitely a key development to watch in the coming weeks/months. The SEC's ultimate decision could shape the trajectory of crypto adoption in U.S. markets. I'll be following credible news sources closely for any further updates on this front.