What is the current state of the law for defense counsel to raise an objection at trial?

defense counsel to raise an objection "would place an unreasonable burden on defendants to anticipate unforeseen changes in the law and encourage fruitless objections in other situations where defendants might hope that an established rule ... would be changed on appeal." " [Citation.] In determining whether the significance of a change in the law excuses counsel's failure to object at trial, we consider the "state of the law as it would have appeared to competent and knowledgeable counsel at the time of the trial." " ( People v. Perez (2020) 9 Cal.5th 1, 8, 259 Cal.Rptr.3d 195, 459 P.3d 1.)