This blog post reflects on a booklet by Christopher Ash on listening to sermons.
From a longer quote this thought resonates about preaching being a means of grace in gathered worship.
“When we listen to an MP3 recording of a sermon, we are not listening to preaching, but to an echo of preaching that happened in the past. Listening on my own to a recording can never be more than a poor second-best to actually being there with the people of God in a local church. It is better to listen to the pastor you know, and who knows you, than to hear a recording of the well-known preaching you don’t know, and who doesn’t know you.”
More here.