[schmichael]

Sometimes! Google still controls Go. Microsoft has retained control of dotnet. Java more successfully escaped Sun/Oracle, but that ecosystem is still governed by a very small number of mostly very large companies.

Regardless the author getting 7+ years of runway out of a specific technology is hardly a waste! My average technology switching time is probably closer to 5-6 years.

[eduction]

True! I think used Perl about that long, and probably Ruby after that. And those are (obviously) general purpose.