It runs smoothly on older hardware and doesn't hog RAM on modern PCs.

: Photoshop 7.0 cannot recognize hard drives with more than 1 TB of free space . If your drive is larger, the program may fail to launch unless you use a partition or fill the drive to under 1 TB. How to Install on Windows 10

: For the first time, users could quickly browse and organize images visually within the application, a precursor to today’s Adobe Bridge. Camera RAW Support