Default Development state of 8.4

Hi All,

I'm strongly considering getting good the very nice 8.4 tablet. However, I'm a little concerned about the state of its development, as the only active project based on touchwiz is shut down.

I'm happy to love off stock provided I can always root it, but I'm concerned about not being able to get future updates and keeping root. As a result I have two questions.

1. Is there always some method to root this device as it gets updated even if development doesn't become active? Will existing root methods work on future updates?

2. Is it likely that touchwiz based development will pickup? Are there projects I'm missing? I'm quite attached to multi window and would like it in any future Rom.