[kristofferc]

There have been over 25 000 commits since that post was written, clearly, any comments about the specifics of the language are terribly out of date.

For example, the base language now has 92% test coverage. CI is being run on Windows 32/64 bit, Linux 32/64bit, macOS, FreeBSD with ARM CI coming up. Every day a large number of benchmarks are run on dedicated hardware and the results are tracked. Benchmarks are also run on most PRs that has potential performance implications bhefore merging. Before new point releases, the tests for all registered packages are run and compared to the old version. Every new failure in a package test is tracked down to make sure there is nothing breaking in the point release.

While package load time is still an issue, the introduced precompilation feature has significantly helped with this. Also, new methods of working with the language, like Revise.jl (https://github.com/timholy/Revise.jl) which updates the code that is being executed in real time when you save your file, makes load time much less of an issue.

No matter who the author is of a blogpost, if it is made about something that has been in rapid development for years after the post was written, the information will have little relevance to the current situation.