A super-powerful processor
This processor is everything I expected. The last time I upgraded my configuration was in 2010. A good little i7 with a GTX 980 Ti and 32GB of DDR4. It performed faithfully for a decade. Such is the decline in hardware gains these days.
But; over time, the demon has taken over. The new graphics cards are frankly too appetizing and, as a gamer, I couldn't resist any longer.
Now I have a configuration that will certainly last me another ten years, if not more, with a tenfold increase in power compared to what I had before.
It was worth the wait.