https://awesomekling.github.io/Memory-safety-for-SerenityOS/
Their GitHub has 0,3% Swift code. They said they start once Swift 6 is out. It has been out for months. So either they abandoned Swift or haven’t really started or they are really really slow to start using it. All three options are against the article being outdated, wouldn’t you agree?
At least C++ has mechanisms to write safer code, provided one makes use of them, even if still there are issues.
To use a modern example renaming the JavaScript file extension to a Typescript one, only gets you so far.
Then one can make use of Typescript's type system, or switch to Elm to the next level.
I'm pretty sure that everyone does and did, because almost nobody wrote a browser in C either, never mind in 2018.
NetSurf from 2002 is the only one I can find?
edit: I should say after the first set, because Lynx and Mosaic are C.