Java garbage collection gets out of control when cramming 100+ poorly optimized mods together. The bedrock edition is great in theory but the proper mod API never appeared. Regardless, people have accomplished some really impressive stuff with commands, but it is an exercise in pain.

The other issue with bedrock is it is far from feature parity with java. If these two things were hit then java could be reasonably retired. However we are decades too late in it being acceptable to introduce a breaking change to mod loading. So it's java forever.

You're right. Hytale is certainly shaped similarly in that regard.