Sony produced what they have been aiming to do for a long time.
Sony got burnt big time by the PS3, and learnt valuable lessons from Microsoft with how well designed a system the 360 was, and it was so far better designed than the PS3, it wasn't funny.
Better Ram set up, better GPU, far easier to program CPU, all while being cheaper and released a year earlier.
When Cerny took over the reigns he made the PS4 to be way more efficient and better designed than the PS3, and he has taken it even further with the PS5.
Sticking with a 36CU GPU, but clocked as high as they could safely get it to, basic API, and advanced tools and development environments that flow straight on from the PS4 ones.
For what Sony wanted, they certainly nailed it.
MS went a different direction, totally new API extensions such as Mesh Shaders, VRS, SFS, machine learning as well as XVA, larger GPU, not as straight forward Ram set up amongst others. They also brought the PC development tools along with the Xbox ones, meaning a more wide spead set of tools, while Sony is purely focused on one console.
I am not shocked that Sony came out of the blocks as quick as they did. I think it is a result of what their aims were.
Will be interesting to watch how it progresses. I personally think that the XSX will have longer legs and push past the PS5 as time goes on and devs get used to these new API features.
For what we thought was going to be a pretty boring generation with two consoles being very similar, they are far more different than we thought.
Fun times ahead.