If concern over Toxic Cabin Air was really the driving reason to go bleedless on the 787, the logical thing would have been for Boeing to adopt similar architecture on their other aircraft as soon as it's convenient. Yet since the launch of the 787, EVERY other Boeing airliner model has undergone or is undergoing a major upgrade (737 MAX, 747-8, 767-2C, 777X - all except the 767-2C involving completely new engines) yet all have maintained engine bleed.
And despite not using engine bleed air, I know of at least one oil fume event on a 787 (due to a bearing problem in the air cycle machine).