The most constructive thing we could do is convince Apple to educate it's users on how to install and test a new OS safely. The good news is that upgrading safely is entirely possible with just a bit of extra work. The problem is that millions of people don't know that.
All that's needed to solve a great many of these problems is a large font link called LEARN HOW TO UPGRADE SAFELY placed on the sales and download pages, and any other place where the typical upgrading user would see it. The link could even be built in to the installer itself.
All this pointless drama about upgrading, which reappears year after year after year with each new incarnation of OSX, is not really a technical problem, but a human communication problem. Or if you prefer, a culture problem.
Both Apple and it's more experienced users on this forum are acting like a bunch of stubborn old mules, as they insist on doing the same thing over and over and over, and the same old thing keeps leading to the same old problems. Helping distressed upgraders one by one by one by one by one is laudable, but it's also a highly inefficient and dense way to address this chronic problem.
I appeal to the more experienced and connected users on this forum, many of whom have shown an admirable willingness to help the less experienced.
Please, think different, help smarter.
Please reach out to your contacts within Apple and help them see how it easy it would be to protect their wonderful brand from all this unnecessary bad press drama.