Part of the problem is the kind of corporate windows CRUD apps that Delphi excelled at are better implemented as web apps. Which leaves it relegated to hobby developers and 1 man software vendors.
Even weirder is that in 2002 the Delphi community developed a python 2.7/3 type schism over UI changes and .NET inclusion and a large portion of the community refused to adopt new releases. It's pretty telling when a vendor isn't even able to get many of it's own supporters (many of which are these "Delphi will never die" types) to buy new version of their software in over a decade.