General usage:
* The old typewriter is now obsolete in the digital age.
* That software is obsolete and no longer supported.
* The library's card catalog is obsolete since the introduction of online databases.
Highlighting the negative impact of being obsolete:
* The factory's outdated machinery made it obsolete and unable to compete.
* His skills became obsolete when the company switched to a new technology.
* The once-popular TV show is now obsolete and forgotten.
Using it figuratively:
* The old arguments against women in the workplace are now obsolete.
* His ideas about the world were becoming obsolete with each passing year.
In a formal context:
* The research paper made a compelling case for the obsolescence of the current model.
* The company's financial performance suffered due to the obsolescence of its products.
Remember to choose the appropriate word based on the context. "Obsolete" means something is no longer in use or no longer useful.