PANO IMAGES
Technically, implementing panoramic stitching in a DSLR wouldn't have been significantly more difficult than in a mirrorless camera. Both types use digital sensors to capture images, and the stitching process is primarily software-driven. However, DSLRs in 2009/2010 were generally larger and heavier, potentially making the smooth panning motion required for good panoramas more challenging. Additionally, the market positioning of DSLRs at the time might have meant manufacturers prioritised other features over in-camera panoramic stitching.