All the efforts of Fabien in recent years was intended to, in principle, to destroy such a thing as a must-have packages
4 and Symfony is the result of such efforts.
Applications of the framework, an infinite number. If we have a JSON API, then it does not need the Twig and Form. If this is a set of console tools, it is not necessary validator. And so on.
When talking about "standard" website, here set default: https://github.com/symfony/website-skeleton/blob/4...
And I honestly do not understand why the question mentioned 3 and 2 version.
To start the project in Symphony 3 is like buying a horse and cart instead of a car.