Hey everyone,
Kirby 4.5.0 is officially out now:
https://github.com/getkirby/kirby/releases/tag/4.5.0 
We still get questions about our versions one year later and it’s mostly our fault because we changed our version system after 13+ years 
This is a minor release and should have zero negative side-effects in your projects.
One word about PHP 8.4:
PHP 8.4 has been released the other day and so far Kirby 4 is not compatible with it. We will have full support in Kirby 5 and we will also offer a Kirby 4 version with 8.4 support soon. But so far, we struggle mostly with dependencies that have not been updated yet.
It’s also getting more and more common in the PHP world that libraries cut support for the oldest supported PHP version when introducing support for a new one. I.e. cut support for 8.1 when supporting 8.4. We want to do the same in Kirby 5 and cut support for 8.1, but we would still like to support 8.1 with Kirby 4. That’s a bit of a logistical issue with dependencies that are more strict, but we think we have a good practical plan for this. Stay tuned for updates.