On Tuesday, I've held a session "Why Symfony?" at the #IntPHPcon
Munich. That was a live coding session mainly, but if you're interested in the slides of the first part titled "Do I Need a Framework?", they're online now.

https://slidr.io/derrabus/why-symfony-an-introduction-to-the-popular-web-framework

Why Symfony? An Introduction to the Popular Web Framework by Alexander M. Turek

Modern PHP already provides everything I need to develop a web application, doesn't it? Let's take a look at what an application framework like Symfony does for us. We'll learn how to use Symfony to quickly achieve presentable results without having to reinvent the wheel for every application. Note: This was a live coding session at International PHP Conference 2023. The slides only cover the first part of the session.

slidr.io
@derrabus great slides, would have loved to see that talk