If you have used any version of Photoshop from the last 10 years, using 6.0 will feel like you are missing a hand.
For users wanting a low-cost, classic interface, (officially free in 2013 for legacy owners) runs marginally better but still lacks modern scaling. The better modern alternative for nostalgic workflows is running Windows 98 or XP in a virtual machine (e.g., VirtualBox) on Windows 10. adobe photoshop 6.0 windows 10
However, if you are a retro computing enthusiast or simply prefer the lightweight speed of pre-CC software, here is the detailed breakdown of what you are getting into. If you have used any version of Photoshop
If you want the "feel" of classic Photoshop but need modern features on Windows 10, I highly recommend Affinity Photo 2 . It costs a one-time fee (around $70), feels much lighter than Adobe CC, handles RAW files perfectly, and runs natively on Windows 10 without compatibility hacks. However, if you are a retro computing enthusiast
~600 (suitable for a short technical note)