People like simple life with as few choices they have to make as possible, right? It's now very simple to start a Java project, when the obvious choice is Spring and everybody uses it.

But is it what everybody really wants? To have a single choice? GlassFish provides a choice for those that don't want to become stuck with the "only" option that everybody uses. Java itself provides a lot of options - Oracle JDK, Azul JDK, Corretto JDK and many others. And that's a good thing. Options in frameworks and application servers are a good thing too. The best option wins. Except, there's rarely the best option for every case. And it's good to have all the other options too, in case the most popular option isn't a good one for you.