with virtualization, we traded access to physical hardware for many benefits.
with virtualization we went physicalserverless.

with containers, we traded full access to the OS for many benefits.
with containers we went operatingsystemless.

with Lambda, we traded full control of containers for many benefits.
in AWS, Lambda does use containers (I'm told) but we (mostly) don't care.
in Azure, Functions don't use containers but we (mostly) don't care.

and thus containerless...