Who Me Too'd this solution

Information about what NG products have reached End of Service life:

https://www.netgear.com/about/eos/

Which features on R series routers that are being discontinued or removed:

https://kb.netgear.com/000061057/Which-older-features-are-discontinued-for-my-NETGEAR-router

3rd Party FW Support after End of Life

Users if there units are still working and want to continue using them, could review the following 3rd Part FW sites for FW support on there supported models they support:

• https://openwrt.org/supported_devices
• https://dd-wrt.com/support/router-database/
• http://www.voxel-firmware.com/

Any and all support help and information is handle by these sites and not by NG.

Otherwise, consider getting into a newer generation router. 

Good Luck.