Given European demographics and the changing political landscape, it's hard to imagine that the quality of life in Europe can remain as it was through the 1990-2010's. Additionally, many European cities are essentially museums, riding on what was built centuries ago, with little innovation. If you don't believe this, just go to a German city that was completely destroyed during the war.

I'd imagine that Europe is at or near the peak in terms of its quality of life.

At least some of the European lifestyle has been due to peace on the Continent. Up until now peace in Europe has been funded by US taxpayers. The situation in Georgia and in Ukraine is what you get when European affairs are left to Europeans. Without the US providing military aid to Ukraine, Ukraine would have fallen and you'd have Putin banging on your back door.

Additionally, the EU's inability to supply Ukraine with basic military equipment such as artillery shells is indicative of how Europe is devoid of industrial capacity and couldn't rally in its own defense if it had to.