This is contrary to what is listed on the Tesla Website. According to the website, Auto Lane change is available now...so terminology needs to be cleared up
The Australian web version is slightly different from the USA version.
The USA version has:
"Navigate on Autopilot: automatic driving from highway on-ramp to off-ramp including interchanges and overtaking slower cars."
Without "Navigate on Autopilot", Australian version is still capable of Auto Lane Change AFTER a MANUAL turn signal initiated by human.
With "Navigate on Autopilot", the system can do an Auto Lane Change without any intervention by human. Thus, in simple routes, the only intervention from human is to turn on the "Navigate on Autopilot" from on-ramp and the system will do all the lane changes and through different freeway interchanges on its own until it will ask human to take over at a destination off-ramp.
And I think that's what
@conman meant.
"Assisted lane change" is current Australian Auto Lane Change version without "Navigate on Autopilot". Current Australian version of Auto Lane Change can happen ONLY after a manual turn signal performed by human.
"Auto-lane change" in Australia is currently not true "auto" because it still needs assistance from human to tell it WHEN to do an Auto Lane Change.
Tesla calls it "Auto Lane Change" because current new global Autopilot cannot perform a lane change automatically even after human manually turn on the turn signal. The signal will keep flashing but the steering will continue to center in the present lane without changing to a new lane.
So when Tesla calls "Auto Lane Change" I think it means that customers need to pay for FSD to get that function.
But I think
@conman would not call it true "Auto Lane Change" until "Navigate on Autopilot" will be activated in Australia.
In summary, the salesperson is correct about the extra cost of FSD if customers want any kind of lane change automation (partially assisted as in current Australian version or completely human-free as in USA version.)
Hope that helps.