Do not conflate SAMs and integrated air defence systems. An IADS that cue in interceptors and guide missiles from various different platforms is massively more capable than an SAM alone and massively more survivable.
But that's considering the system outside of the doctrine. The purpose of these air defence systems isn't going to mount an eternal and fully insurmountable wall against air power.
Rather, the purpose is to greatly reduce the initial effectiveness of US airstrikes for hours to weeks until American military infrastructure can be struck.
Stealth does not increase the complexity of radars. They simply operate on a different wavelength. This took some engineering to increase the precision but there is no reason for a VHF radar to be any more complex than an X-band radar.
VHF radars in many ways are more practical than X-band radars because the lower frequency allows for more mobile and more survivable radar infrastructure. For example, Israel struck Chinese VHF antennas in Syria. But because the antennas were relatively cheap and decoupled from processing, the Chinese were able to swap out the antennas and repair their radar in a day or two, thousands of kilometers away.
But that's considering the system outside of the doctrine. The purpose of these air defence systems isn't going to mount an eternal and fully insurmountable wall against air power.
Rather, the purpose is to greatly reduce the initial effectiveness of US airstrikes for hours to weeks until American military infrastructure can be struck.
Stealth does not increase the complexity of radars. They simply operate on a different wavelength. This took some engineering to increase the precision but there is no reason for a VHF radar to be any more complex than an X-band radar.
VHF radars in many ways are more practical than X-band radars because the lower frequency allows for more mobile and more survivable radar infrastructure. For example, Israel struck Chinese VHF antennas in Syria. But because the antennas were relatively cheap and decoupled from processing, the Chinese were able to swap out the antennas and repair their radar in a day or two, thousands of kilometers away.