Recently Lufthansa announced that they (will) remove all A380 airliners from active service earlier than planned. The Covid-19 pandemic hit the airlines hard and those big airliners are the first to go.
Lufthansa has 8 Boeing 747-400 and 19 Boeing 747-8i, which came to the fleet recently. They will keep the 747-8i for now I think. But you are right, the 747 will also disappear sooner than later.