The circle continues
Having worked in this industry for over 3 decades now (disclaimer, not a claim to ability or know how, just as a reference to time observing) it is like most things purely cyclical, as others have mentioned. Though the infrastructure has changed the rotation between centralised and decentralised has come and gone 3 times in my professional lifetime thus far. What I find interesting is that the argument between centralised and decentralised is actually quite similar to the argument between desktop OS's. There is an ongoing battle between what many would like to see happen and reality. A cloud based system would be awesome, but in reality we are still a very long way from this being successful everywhere for everyone. An owned by all desktop operating system would be awesome but we are long way from it being a useable reality for the mainstream user.
I am a hybrid in that I kind of straddle two worlds, IT and operations. I have IT knowledge to figure out how to make things work but I also have to keep in mind there is limited time and I have a day job of making sure everything is working day to day. Thus while often I do find myself tweaking and fighting with things to make them work correctly because I want it to work my way, more often than not I just need it to work mostly correctly now and on the first try for efficiency and so I can get on to the next task.
Long story short, though I have lived a life as a Unix system admin and Linux user I have been saying since the 1990's Linux would never be the mainstream user interface because it/we are our own worst enemies.