What you mean, Is that we should avoid starting our projects with UE5 early version 2? we won’t be able to convert those projects to UE5 final version?
We should start our UE5 projects on UE4.26, right now we won’t be able to use Nanite, Lumen, MegaAssemblie or any new feature… But when UE5 is released we will be able to upgrade only from UE4.26-27 and use all UE5 features, but if we use UE5 right now, since it is an early version, we won’t be able to convert without bugs.