Struck down twice, on two different theories
Illinois' Supreme Court dismantled legislative damages caps in two separate rulings, thirteen years apart. Best v. Taylor Machine Works (1997) struck a broad $500,000 cap covering all common-law actions, finding it impermissible special legislation that singled out certain injury victims. Lebron v. Gottlieb Memorial Hospital (2010) struck a narrower medical malpractice-specific cap on entirely different grounds: separation of powers, holding that a legislature cannot override a jury's noneconomic damages finding without usurping the judiciary's role in reviewing verdicts case by case.
That second theory is structural — it doesn't depend on how narrowly a future cap might be drawn, which is why Illinois has had no enforceable noneconomic damages cap since. On fault, 735 ILCS 5/2-1116 bars recovery once your fault exceeds 50%.