That has been gone for a long time already. I have not had any special greetings in any airline of the Lufthansa group on long-haul flights over the past couple of years. Very rarely, I get a visit from the purser during a short-haul flight, happened to me on OS, LH and LX, but at most one in twenty flights if not less.

It is very clear that LH is moving away from a model where loyalty matters, so you should not show any loyalty either!

Then again, a similar trend on BA. Used to be greeted by purser on every other flight - now, almost zero. At least, they have the excuse that their staffing on long-haul flights was cut by one crew member.