Excellent discussion. Here’s a musical take.
That site is normally a good source of information, but that particular section "6 Bigger Amplifiers" seems short sighted to me:
@larryi I get that a designer might think of his product like a fine wine; or at least, convey that POV to a customer. But the idea that they had not measured the output power is a stretch! This is because you cannot know if you have optimized the output circuit without at least measuring the power!
@mulveling. I think this addresses what you wrote in your post.
Danger! Danger, Will Robinson! See below: