@dan @ben I don’t think this is entirely correct. I have a website with forms and CMS built in Elements 1.6.3, and I’m using PHP 8.2.0. Everything worked fine.
After upgrading to Elements 2.0 and uploading all the files, I only get a message saying that PHP 8.4.0 is required. My ISP only provides PHP 8.3.0, so I had to re-upload everything from Elements 1.6.3. After that, my website started working again.
Composer detected issues in your platform: Your Composer dependencies require a PHP version “>= 8.4.0”.