You can call anything a pizza if you want. It becomes a useful term if it’s commonly understood by your audience.

No judgement but here in the UK this is more like what we’d call a flan than a pizza or a pie. So instead of arguing about pizzas and pies, why not embrace a third category?

If based on the thing I used most then it has to be Firefox!

If you want something more trivial but personal, openttd - the best game ever. :)