Reading Wikipedia and other questions like this, made me curious as to why Boeing uses bleedless architecture for its B787, while Airbus thinks differently for its A350 XWB (and Rolls-Royce thinks the same).
Both companies switched to composite materials for their new aircraft so they agree about some new technologies, but not all, since they have different approaches to the air systems.
Why did Airbus remain more conservative on this topic (even if its model is about 5-7 years younger than the B787)? What is Airbus's argument to sustain this choice and how does it compensate the disadvantages (cited by Boeing in linked post) of the traditional bleed air systems?
To be more precise, development of new technologies bring both companies to share many new common approaches because advantages are clearly evident, for example: glass cockpit, composite materials, wing extremities (sharklets/raked wingtip/winglets), bigger fans, but they are different ideas about others, such as control yoke, flight envelope, chevron onto engines and, effectively, bleed air.
I found information about "why" Airbus choices to avoid chevrons or prefer a side-stick joystick for example, but not about bleed air systems