The word supplant means to replace can that mean in a bad way or good even both?

You're right, "supplant" can have both positive and negative connotations, depending on the context.

Negative Connotations:

* Replacing something valuable: "The new technology supplanted the traditional methods, leading to job losses."

* Taking over unfairly: "The ambitious CEO supplanted his mentor, ruthlessly seizing control of the company."

* Displacing something cherished: "The noisy new neighbors supplanted the peaceful atmosphere of our community."

Positive Connotations:

* Replacing something outdated: "The new software supplanted the clunky old system, making our work much more efficient."

* Improving upon something existing: "The talented young artist supplanted the older, less innovative ones, bringing a fresh perspective to the scene."

* Evolutionary progress: "The new species gradually supplanted the old one, leading to a more diverse ecosystem."

The key is to consider the specific context in which "supplant" is used. Look for clues about the nature of the replacement and the consequences of the change.