Due to him favoring ideology, - Cannot be used in the majority of web browsers. - Cannot be used in the majority of photo viewers. - Cannot be used in the majority of photo editors. - Cannot be used in phones, tablets, and cameras. - Cannot be used in TVs and dedicated media hardware.
There's a reason why people do not use GPL for codecs and file formats. It causes everything that even thinks about it to be GPL through its intrusive tentacles and web of limitations.
