Comment by array_key_first

I think most software is like this if you sit and reason about the domain model long enough. It's just easier to say "fuck it" and allocate each individual object on its own with a lifetime of ???.

Also, is easier to refactor if you do the typical GC allocation patterns. Because you have 1 million different lifetimes and nobody actually knows them, except the GC kind of, it doesn't matter if you dramatically move stuff around. That has pros and cons, I think. It makes it very unclear who is actually using what and why, but it does mean you can change code quickly.