Dear experts, thank you for your answers. As for the new functions, the R77.x software functions are enough for me. Most often, the search for firmware updates is associated with the desire to get rid of failures. In my case, this is a device failure with the inability to reboot it through the Gaia Portal (only power reboot). Failure occurred non-periodically, sometimes after a month, sometimes after six months. I installed the latest firmware today (990173127), the result will be known closer to the end of the year.