Thiers no defintive answer to that question.I have had 3 bows that were less than a year old blow up.One riser blew in half at the throat of the grip.I had a bow bolt TD blow in half.A longbow limb that folded in half.All these at full draw.Had an all wood laminated bow start to seperate between the lams just beyond the fadeouts.
I have had a few other bows that had thousands upon thousands of shots put through them with no problems at all.I take good care of my archery gear.Some are destined to have problems at some point.Some are solid state and gonna take a licking and keep on ticking.These bows that bit the dust were all made by reputable bowyers who knew thier craft.
A lemons going to show up once in awhile.But in general a well made bows gonna last a long time with reasonable care.