In/out traffic can be disabled...but Emsi servers are still connected in both ways? So...what actually is disabled in such case...and what is still enabled?
BTW...it's a bit weird "invention" because a lot of old firewall aps in the past offered it normally...OA also.
all these have network kill switch
spyshelter (tray context menu)
kaspersky
bitdefender
windows firewall
others all do
any firewall can be made to autoblock unknown process by default
create firewall block rule automated
nothing new
been around forever
like you say oa eis did it for years
wasted effort making rules until a process actual does something
unknown process that sits there and does nothing
why make firewall rule ?
emsisoft prevent sophisticated code injection attack used to bypass firewall rules
block entire network failsafe for worst case
only one two few other can do same