It came from Googlers, who are kind of notorious for not using the rest of the industry’s tools. Sometimes it’s because they pioneered the problem space, and their own tools really are that much better. Sometimes their tools used to be better but are now just tech debt. Sometimes it’s promo-driven development.
Guava -> The JDK Std library, unless you need more performant collections provided by it.
Guice -> If you need to support the jakarta.* namespace the only real answer is Weld or another CDI compliant implementation. Otherwise guice is probably still fine.
