Upgrading from Atlas.Pdo 1.x to 2.x should be painless.
The primary difference is that it requires PHP 8.0, given the addition of expanded and stricter typehinting in 2.x.
Connection::fetchOne() now returns array|false instead of ?array; if you
previously checked for null, check for false instead.
Connection::fetchObject() now returns object|false instead of mixed.
Connection::fetchValue() now explicitly returns mixed.
Connection::fetchAll(), fetchColumn(), fetchGroup(), fetchKeyPair(),
fetchObjects(), and fetchUnique() now return array|false instead of
array.