We're not reaping the benefits of work anymore, it's mostly trickling upwards now so not really interesting. Makes sense to spend time on video games where you feel a bit more rewarded.
Do you recommend any books / courses that could help give me some sort of curriculum around this knowledge ?
I unfortunately don't know what I don't know, so I'd need a bit of guidance to learn efficiently. Something like http://pages.cs.wisc.edu/~remzi/OSTEP/ maybe ?
Nice, that's really interesting ! How did you touch so many different languages, was it only on personal side-projects or did you learn on the job ?
I'm afraid learning too many different languages just for fun would be detrimental on my main "job" language, like I'd forget the main patterns. But probably not.