What is the current state of the law on the defence counsel's failure to make objections?

"Generally, failure to make objections is a matter of trial tactics as to which we will not exercise judicial hindsight. [Citations.] `[C]ounsel's conduct should not be judged by appellate courts in the harsh light of hindsight . . . and except in rare cases, an appellate court should not attempt to second-guess trial counsel.' [Citations.] `It is not sufficient to allege merely that the attorney's tactics were poor, or that the case might have been handled more effectively. . . . Rather, the defendant must affirmatively show that the omissions of defense counsel involved a critical issue, and that the omissions cannot be explained on the basis of any knowledgeable choice of tactics.'" (People v. Lanphear (1980) 26 Cal.3d 814, 828-829, italics added.)