The features which make a language rise rapidly might just be different to the features that make a language "good".
PHP in particular is amazing for getting started at speed. I remember taking a HTML file and popping in a couple of lines of PHP in the middle. I still haven't found anything anywhere near that easy for making a server backed website.
You aren't the first person to think of this. It is otherwise known as Worse is Better[1]. Stuff that doesn't have all of that nice formalism but lets you get simple applications working without a lot of up-front training and boilerplate tends to be what people gravitate towards instead of "properly designed" languages.
The features which make a language rise rapidly might just be different to the features that make a language "good".
PHP in particular is amazing for getting started at speed. I remember taking a HTML file and popping in a couple of lines of PHP in the middle. I still haven't found anything anywhere near that easy for making a server backed website.