Realizing that game discs for original Xbox consoles could be scarce, Spencer said that plans were in place to make compatible Xbox games available digitally.[23] Spencer also said that such games may also be incorporated into the Xbox Game Pass subscription service.[23] In a later interview, Spencer indicated that the potential library of Xbox titles being playable on Xbox One will be smaller than that currently available from the Xbox 360 library.[24] Spencer noted two reasons for the more limited library were the availability of content rights for the games and the technical difficulties related to the conversion.[24]