Will there be support for WebApps 4.0, i.e,, with <web-app version="4.0" ... in web.xml in Eclipse 4.7.3 for the Tomcat 9 adapter? Unfortunately, the respective bug entry https://bugs.eclipse.org/bugs/show_bug.cgi?id=529156 contains no new information.
@Larry Isaacs: Maybe you could have a look on that?
This is kind a show stopper: My students cannot start the provided demo application as a war-File. Unfortunately, they often switch to IntelliJ then.
It appears that WebTools 3.9.x version that comes with Eclipse 4.7.x does not include support for Servlet 4.0 Dynamic Web Projects. WebTools 3.10.0 coming this summer will support Servlet 4.0 Dynamic Web Projects. I'll try to take care of that defect prior to the M6 milestone for Proton that is coming in March.