Not to mention that no one knows or can know at this point if or how many lawsuits may be filed for incidents/injuries/economic loss attributed to these rides and occurring prior to now.
Browntggrr has it exactly, more so than whatever is causing these rides to shut down, it is the multi-hour rescues that are a serious, unacceptable problem for the parks, riders, and the manufacturer. Such waits are not just publicity nightmares, they are unacceptable in many, many ways; including safety, customer experiences, and now even from a litigation exposure standpoint.
Typically, litigation is not filed until just prior to the expiration of statutes of limitation. If and when that happens, there will be more publicity.
Especially in California, I'd not assume none of the riders will be litigating.
Terp, who is not engaged in the private practice of law in Georgia, California, Ohio, any other United State nor in Canada. There is no legal advice pertaining to any specific situation or client contained herein. Consult a competent attorney in your jurisdiction if you have or think you may have a legal problem.