Goblet squats make excellent finishers, but heavy dumbbells can be awkward when fatigue hits. A cable setup keeps the load stable and lets you push the legs hard with less hassle.
Chains make full squats more manageable where lifters are weakest and heavier where they are strongest. See how accommodating resistance changes the feel of the lift.
The original hack squat was not a machine exercise. This post brings back the barbell version with a heels-elevated twist for quad emphasis.
A programming article on pairing the squat with true antagonist movements. It introduces inverted squats, reverse cable squats, and reverse band squats as unconventional ways to balance heavy lower-body training.