There are comrades who are not our comrades, who believe that if you use a language, then absolutely everything should be written in that language.
For example, that Spring should not be used with Kotlin, but at least Kotor.
This is good for the community, because new technologies and libraries are developing, but from a practical point of view, until it becomes clear that the pros cover all the cons with a vengeance, it makes no sense to use them in commercial projects (to fill the cones yourself).