@samsonasik @TomasVotruba is it worth supporting php5 rules?

@staabm we use LevelSetList::UP_TO_PHP_82 which from php 5.2

So, we know of projects still running on php5 which use rector to upgrade to php7/8?

On downgrade, we removing support to downgrade to php 5, but for upgrade, I think that's still a good to have and improve code quality and reduce error prone, eg: on add default value to undefined variable from php 5.6, or make long array syntax short, or remove continue to break syntax;

The "error warning" probably can be hidden, but can be fixed by upgrade the code to remove the limitation of old behaviour via LevelSetList.

So, we know of projects still running on php5 which use rector to upgrade to php7/8?

Yes, 90 % our private clients start on PHP 5.3-5.6 😄