multisite_super_admin.php

add_filter('map_meta_cap', 'less_super_admins', 10, 4);
function less_super_admins($caps, $cap, $user_id, $args){

    $super = array(
        'update_core',
        'update_plugins',
        'update_themes',
        'upgrade_network',
        'install_plugins',
        'install_themes',
        'delete_themes',
        'delete_plugins',        
        'edit_plugins',
        'edit_themes',
        'delete_sites',
        'setup_network',
        'manage_network_plugins',     //these are big removals of all the access to these items   
        'manage_network_themes',
        'manage_network_options',
    );
    $still_super = [1];//user IDs for super admins to retain FULL RIGHTS - all other super admins are limited as defined above
    if($user_id != in_array($user_id,$still_super) && in_array($cap, $super)) {
        $caps[] = 'do_not_allow';
    }
    return $caps;
}