http2 conflicts

The following conflicts are installed on this machine. They will be removed as part of this package selection: mod_cgi php56-php mod_mpm_prefork Should I care? I'm using PHP 5.6 with DSO. Sounds like it's forcing me to upgrade to PHP 7, is that true? Will performance be worse because of not using prefork but event based? If I remember well it is a bit slower, but I'm not sure about the current state.