Here's a list of the most noteworthy things in the RAP 3.27 M2 milestone build which is available for download since October 27, 2023.
With the integration of Eclipse Jetty 12 in the Eclipse Platform, it was possible to upgrade the dependencies and the tooling in Eclipse RAP from Jetty 10 to 12.
Internally, Eclipse RAP is still using JakartaEE 8/javax.servlet.*, and based on Servlet 4.0.
To assist you with the migration from RAP 2.x (or 1.x) to 3.0, we provide a migration guide.