Before we can make TP 4.40.0.Alpha1-SNAPSHOT the default target platform on master branch in parent pom and CI jobs, it's important that you tried it on your component and that you get an idea of how much effort it is to migrate. To know that, just follow the instructions in https://issues.jboss.org/browse/JBIDE-15639 and report your feedback here.
As usual, it's just a simple mvn clean verify -Ptpc.version=4.40.0.Alpha1-SNAPSHOT on the master branch for your component.
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Mickael Istria
Eclipse developer at JBoss, by Red Hat
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