I can think of lots of reasons. Firstly you have to run on Dreams which is PS exclusive and zero option for a cross-platform port. You can't even import or export content but it has to built ground-up inside the engine. Very complex logic requires very messy chip wiring; you really want to work with a scripting language or at least a cleaner 2D object based system like Blueprint. You'll need to train artists to work with the SDF system which'll take time. Tools are great for some things, less great for others. Physics is mental and very poorly explained - see my earlier posts about child object behaviour being affected by parent object's density. Shaders are limited to what Dreams provides. No option for advanced AAA features like custom compute shaders and offloading workload to the GPU. Lighting is also limited - at its best, it's fabulous, but it can also look very old-school. I can't think of a use case where Dreams would be the engine/platform of choice over UE5.
I'm glad it's still being invested in. Curious where MM and Sony see this and the tech going.
