While Drupal 8 & 9 rely on Symfony 3.4 & 4.4 respectively, Drupal 10 is going to be based on Symfony 6.2. That's a nice a leap forward that will allow Drupalers to catch up on almost 3 years of innovation on Symfony's side \o/
In this presentation, we'll review the new features coming to core from Symfony that you could take advantage of. Think about more expressive/automated ways to do dependency-injection, using PHP 8 attributes to configure all-the-things, translation providers, safer sub-processes, etc.
So much new power-tools at your disposal that just wait to be learned about!