There are no real details about the OS in the article. Did anybody here work on the project?
From what I heard from people that work there, this company mistreats employees and has huge problems with management. I could provide a proof link, but it's in Russian.
There is a history of the company suing ex-employees and vice versa. It's pretty ruthless if you break NDA - people get real jail time. I got reminded about that during my exit interview.
I left for financial reasons. They simply refused to give raises to virtually anyone after RUR tanked in 2014, even though 85% of the company's revenues are from foreign sources.