you've seen clone wars right/ Darth Maul returned
well if he managed to survive it is all too possible MAce Windu can also. that would be soo cool though.
What about Anakin? what feel you guys about that? would you believe an Anakin come back... the metachorines reconstintute him, we have no idea whether it is possible, kinda like a Gandalf return, , or a medivh return, it's not quite certain how it happens, but it is to combat a great evil like a punishment of sorts to make up for the stuff he did as VAder.
In a technical aspect you are correct, but in an in universe aspect, you are not. Preserving one's self beyond their lifespan is an aspect of the Dark Side. To live on, the discussion between Anakin and Palpatine states:
Anakin Skywalker: He could do that? He could actually save people from death?
Chancellor Palpatine: The Dark Side of the Force is a pathway to many abilities, some consider to be... unnatural.
So if Mace Windu was actually a good Jedi, he would not be able to hold death at bay as Maul did. It was his hatred of Kenobi that kept him alive. Sure it drove him mad for a time, but his brother's connection pulled him back from that personal abyss.
While Master Windu was a BMF (since it is also engraved on his activation switch), he is not so "bad" that he can maintain his lifeforce within his body once his body failed. Having him resurrected would be a farce, similar to the resurrection of Captain Kirk after the events in "Generations."