It was a pitty, when richer text format was required, but none of the features were visible.
And when installing MCEtiny, CKeditor and other plugins didn’t do anything for that, it brought me an idea that some plugin may be interfering with the latest wordpress version.

Fortunately answer was incredibly simple. It seems like WP users have a setting of “visual” editor, that was disabled.

To reenable Visual editor, go to user settings, and find the place: