[kibwen]

You don't deserve the downvotes, but I'm still not sure what your concern is. The modern history of the programming languages ecosystem is marked by rapid specialization and fragmentation, in which 5% market share is an enormous quantity. Furthermore, relative percentage of mindshare isn't as interesting as absolute numbers: your language needs only enough active contributors to keep pace with the evolving trends of the industry, which can likely be achieved with less than 20,000 active users (well less than 1% marketshare).

The point of any given programming language is not to be crowned queen of the programming prom, it's to produce useful software and improve the state of software development. As long as your language meets a minimum threshold for notoriety (which both Go and Rust do), the fact that they have less marketshare than Java is irrelevant unless your sole motivation for learning a language is to get a job at an enterprise company (which is a fine reason to learn a language, but I think you might be on the wrong forum if that's your overriding concern :P ).