- Will PHP 7.4 disappear from the Plesk update/installation list?
- Does Plesk provide Extended Long Term Support (ELTS) or security updates for PHP 7.4?
Plesk ships PHP 7.4 as is without Extended Long Term Support (ELTS) and will be still provided as delivered by the PHP vendor.
If you are using a Debian-based OS, you may check deb.sury.org and use their repository for PHP 7.4 ELTS once php.net and hence Plesk stops providing updates.
Warning: While this PHP version is still available for installation it can be enabled on a website at one's own risk, same applies for the usage of outdated PHP handlers from 3rd party repositories.