I'm a young developer, but if my experience is anything to go by I think that this age bias is driven by a desire for cost-efficiency over quality. It's cheaper

I'm a young developer, but if my experience is anything to go by I think that this age bias is driven by a desire for cost-efficiency over quality. It's cheaper per unit of work (for some fuzzy definition of unit of work) to hire two young developers than one experienced one, even if the quality of the latter's work would be superior. I'd say I'm a good developer, but I think my employability is as much due to my low wage requirements as it is due to my skill.