dxoPureraw DNG vs. RAW file with xmp

I really like the performance of Pureraw and i wanted to buy but there is one big thing I really don’t like and this is the need to convert every Picture in dng! I think it would be absoluetely perfect if it would write the changes into an XMP file so I would not need the 2-3 times bigger dng format that would be rewritten everytime I edit Tags in example in lightroom. Is there a possibility to make this option available?