Legacy software like version 14.2.1 no longer receives security patches from Adobe. This makes your system vulnerable to exploits that target known bugs in older code.
One of the first versions to introduce tools for refining and printing 3D models directly. adobe-photoshop-cc-14-2-1-full-version-kuyhaa
Adobe moved to a monthly subscription model with CC, which some users prefer to avoid. Legacy software like version 14