By type
/Controllers/Events/ModelsBy topic
/Comments/Posts/UsersBy topic, then type
/Comments
/Controllers/Events/Models/Posts
/Controllers/Events/Models/Users
/Controllers/Events/ModelsMixed
/Comments/Controllers/Events/Models/Posts/Users
Even this is a really, really old gist, I'd still just wanted to share my thoughts on it, which I wrote a blog post about it: https://stefanbauer.me/articles/an-alternative-way-to-organize-the-laravel-directory-structure - I think it's basically what @frankdejonge is doing. Do it for several years now and still happy with it – at least if we're talking about larger projects.
@shochdoerfer I'm still toying with the 1 dir 2 dirs X dirs setup. One thing I don't like is to have to group the domain in an arbitrary namespace. I often see the Web/Http namespacing, but then it comes with a "Domain" namespace too which pretty much always puts me off.