The beta 5 is released. I'm trying to create an Android project just like I used to, but it shows an IDEA-like window where I should choose what type of project I want to create with those options like "Java", "Groovy", "Gradle", "Kotlin"... Where're good ol' "activity"-templates?
UPD
I installed the Beta 5 on a virtual machine working on the same Xubuntu version that my real machine does. Everything works well. Perhaps the issue is somehow related to the fact that I previously installed the Rider IDE by JetBrains. But still, Rider has been installed for a while, and it did not affect the installation of the previous beta versions of the Studio
I detected that Android plugins were not found & not connected to the studio. That was weird. I clicked "Download & Enable" and after several downloading and update processes the studio began working as it used to.