A coworker and I were chatting regarding spring rowMappers and I did a little more research and found the following:
Spring’s jdbcTemplate however only has methods that take RowMapper<T> so it will continue to work with parameterizedRowMapper.
But it seems to me the direction of Spring is to go back to use genericized rowMapper e.g. RowMapper<T>. So for all of my new mappers, I will probably implement RowMapper<T> instead of ParameterizedRowMapper<T>.