Not quite “in production.” The 777-9 has been in development for about fifty years (okay, I exaggerate – fifteen years, okay?), longer than it took to go from the Wright Brothers to the 747 (I exaggerated again – but come on!).
If I recall correctly, the soonest the -9 will actually carry passengers is 2026.
That may have been the last domestic 747 flight, but having vaguely followed this thread, i was surprised to book a Lufthansa flight that’s an A380 going to Germany, and a 747 coming back home. I hope it’s not full. I really feel claustrophobic in a full 747.
Yes, there are still a few airlines outside the US which fly the 747. As you see, Lufthansa is one of the more notable ones. It flies a daily 747 from SFO. Another is Korean Air.
Lufthansa and Korean Airlines were some of the very few airlines to order the passenger version of the 747-8. Most of the 747s being retired are the older 747-400. Being fairly new planes, those 747-8s will likely still be be flying for a while (Although without looking it up, I’m pretty sure Lufthansa is still flying their -400s as well).
Shame they could not have managed to take a side view picture from any distance. What’s unique about SPs in general is only visible from the side. And for the engine testbeds, what’s extra unique about them is normally bolted into the number 1 or 2 engine position.