Point-in-time versus continuous
Every deploy, every new SaaS integration, every forgotten subdomain moves the surface. Sleight re-runs the adversary's side of the exercise continuously, so the finding arrives the week the exposure appears.
It does not replace the human test
A skilled human tester still finds the creative, business-logic flaws. Continuous testing removes the boring 90% so the humans you hire spend their time on the interesting 10%.
Takeaway. Test at the speed your surface changes, not at the speed of your procurement cycle.