Not that surprised. All of the major passenger carriers had plans to retire them within the next 2 or 3 years and it makes sense to drop the older, more fuel hungry and expensive to maintain stuff from the fleet when cash is tight and there's no demand. A number of the modern 2 engine models can carry almost as many bodies as a 747, see below, at lower cost. As for the A380? I'm still not convinced that was ever a good idea. AIUI the freight variants of the 747 are likely to be in service for a while yet so it's not
quite the end.
Mind you the idea of flying in one of Boeing's newer models does not fill me with confidence.
Extracted from
https://askthepilot.com/airbus-to-end-a380-production/"..., but there are, and will continue to be, plenty of very large planes out there. The most common of them, for now, is the Boeing 777-300. This is the aircraft, not the A380, that most of the world’s carriers brought in to replace their 747s. It does the job with two engines instead of four, and with significantly lower operating costs. But it’s by no means a small aircraft. It’s almost the size of a 747, typically carrying around 350 passengers — with even more underfloor cargo space than a 747. Essentially, every 777-300 you see today — and there are nearly a thousand of them around the world — would, a generation ago, have been a 747."
And a bit of history / opinion here...
https://askthepilot.com/747-in-winter/