In early February this year, a Microsoft spokesman said that the company had stopped production of Windows RT-related equipment, Nokia Lumia 2,520 as the platform's swan song, but Microsoft reiterated that "continue to provide support for Windows RT", will continue to provide updates to the system. However, in today's published Windows 10 upgrade matrix chart (determining which devices can be upgraded to a new system), it is clear that a red flag is visible on the Windows RT device, meaning that the system does not support upgrading to the Windows 10 system.
Microsoft has never officially confirmed that the Windows RT system has "died" in the official way, but from the above chart you can see that the existing Windows RT devices are not available for the upcoming Windows 10 update, which has been consulted by the foreign media after Microsoft reiterated the discrepancy. Microsoft has not yet received a reply.