I have noticed that datapacks are kind of unstable and that makes them very awkward to use, some datapacks I noticed depend on each other to work and this chain of dependencies gets broken from play session to play session, especially if you update one of the packs. This can result in chunks you built in getting destroyed. It would be good if there was some clearly specified way of making sure that all of the datapacks you wanted loaded were in-fact loaded, and were loaded in the correct order before you started playing. And started playing every time, not just the first time, doing it with commands mid play will already cause broken chunks too late