i would just throw it away. its probably just a disaster waiting to happen
but it's still working well and and can you tell the diff. between 7200 rpm 2 mb vs 8m cahe drives
The main issue is that it is an IDE drive. You'd need an IDE adapter. Which may or may not be bootable.
A new 1TB drive is ~$50
That 80GB drive is 8% of that. Not even a sneeze worth.
Add to that, it is old. Likely to die sooner rather than later.
Add to that, yes, you can tell the difference between an old 80GB IDE drive and a newer SATA drive.