Part.?...I have no clue!, but this is one of the exiting things happened the last few months. As per 2019 the server upgrade to 1.14 progressed, so is the 1.15 update slowly booking more succes  in the world of MC server owners...

 

At least some people go with the flow, and that is only for the better..... or not?

The only 'NOT!' that I have witnessed is a fault in either Mojang or Spigotmc.... I can tell that in one of our worlds, Amigos, a world apart from others and maintained for years on an English server until the owner thought that it was enough.

In this world I came upon a sign telling that through updating the Spigot version then, some pictures made from maps were lost during this upgrade process...

It is not possible for me to pinpoint a victem in this area, so, I go again with the flow, and after thelast upgrade all other mapped pictures that were gracefully and sparkling fresh on the walls of Bunderburg's buildings, were now empty dull frames with no picture.....

 

Yes I also went to the github and complained about this, in the end starting an old 1.12.2 server with that world, showing the pics were there, the developers could not help.....

The sorry way to progress, but I can't blame them for wanting to go foreward, neither can they, and neither can the worlds that are upgraded to an unreversable  upgraded world.

 

In two short words: A PITY!

 

So if you enter those worlds and stumble upon an empty looking wall, bare in mind that the cleaning lady wiped them clean per accident.....(-: