Coverting Map To World Partition 0% - Help?

Hi everyone, I’d like to preface my question by saying I’m definitely a noob, and my own mistakes have likely led to this problem. Im at an impasse between solving the issues Ive created, and deleting my world and beginning again. I’d greatly prefer the former, as I have spent close to 2 years on my world.

I constructed a very large world within one level, consisting of nearly 40,000 actors, of which over 100 are landscapes of varying sizes, materials etc.
I fully designed and decorated the world by hand, placing many of the static mesh landscape elements manually and with no procedural generation aside from some of the landscape materials.

This project began in UE4.27 and I stuck with it despite UE5’s release because, even at that time, I felt it was too much to switch.

Now I have realized my only shot at keeping my world is to switch to UE5 for world partition, as world composition (which I only learned the importance of recently) isn’t retroactive for landscapes made before enabling it.

I successfully moved my world over to UE5.23 and I hit Convert to World Partition, and for about 8 hours now, Ive been stuck with the loading bar at 0% for “Converting Map To World Partition”.
I can see that my CPU is nearly maxed, as well as my memory, so somethings going on in the background, and furthermore when I hover my mouse over “Cancel”, i can see it highlight, so I know Unreal isnt frozen.

I guess my question is: am I screwed? Should I wait? Does anyone have experience with this? Id appreciate any help. The younger me really screwed over the current me. I should’ve listened to more members of the community when they said the documentation is much more important than tutorials!!!

I have a similar problem… But the only thing in my world is a large landscape. The engine isn’t utilizing many resources, so I’m not sure what the problem is

I have the same issue, but something you could do is to pack your actors into various packed level instances so you could at least move them to a NEW level with world partition by hand if nothing else. That way you won’t need to place them all back down by hand, just position the packed level instances correctly.