Quite a bit of progress and new material over the last few months.
These are just the new lessons, I'll let you know about the new courses soon :)

Here's what went live: 

In Learn SOLID Principles:
  • SOLID Synergy and Pragmatism
  • The Open/Closed Principle (OCP)
  • The Interface Segregation Principle (ISP)
  • The Liskov Substitution Principle (LSP)
  • The Single Responsibility Principle (SRP)
  • SRP in Practice
  • The Dependency Inversion Principle (DIP)
  • ISP in Practice

In Learn Maven:
  • Importing a Project into the IDE

In Learn Java Streams and Lambdas:
  • Parallel Streams

In Learn What’s New in Java:
  • Stream API Additions
  • Sealed Classes
  • Custom Serialization and Deserialization
  • Other Key Additions
  • Switch Expressions
  • Compact Source Files and Instance Main Methods
  • Overview of the Java Release Cycle
  • Other Key Additions
  • Key Additions - Java 26

In Learn Java Basics:
  • Date and Time
  • Enums
  • Basics of Working with Files
  • Generics

In Learn Java Logging:
  • Logback Configuration
In Learn Design Patterns:
  • The Facade Pattern
  • The Strategy Pattern
  • The Command Pattern
  • The Template Method Pattern
  • The Chain of Responsibility Pattern

Of course, each course has a Changelog - which is more complete, to see exactly what new material you have access to.

Hope this quick heads-up helps.
Cheers,
Eugen