No 3D layers, no neural filters, no cloud syncing, no content-aware fill (beyond the healing brush), no support for modern RAW formats (CR3, ARW), and no CMYK modern color profiles.
Many legacy systems (kiosks, POS displays, industrial control panels) still run Windows Embedded or older OSes. Photoshop 7 Portable is the only image editor that can edit ancient .PSD files without corrupting layer structures that modern software might break. Adobe Photoshop 7 Portable
Most downloads on Torrent sites or file repositories (Archive.org, OldVersion.com) contain malware. Look for files that end in .7z or .rar and are roughly . If it is 5MB, it is a virus. If it is 2GB, it is fake. No 3D layers, no neural filters, no cloud