In your opinion which is the best processor Intel or AMD?

I was told by an old IT friend to always buy Intel over any of the others. So Intel it has been for the last 17 years or so. My friend has passed & I can’t get updated info from them. Now I’m reading that Intel is falling out of favor & none of the explanations give me much in the info department. So, I’m asking, in your opinion which is currently the preferred processor? It doesn’t have to be one of the 2 I’ve listed, but what you consider the best of what is currently available?