In afghanistan in the 80s and other wars since the VDV in particular liked to lash twin 23mm cannon to trucks and APCs as direct fire mobile fire support, but I suspect they might be interested in upgrading... once the Shilkas are gone from service there will only be the twin 23mm towed guns firing that powerful round... it is a 23 x 152mm round with high velocity... the other weapons in 23mm calibre are the 23mm guns on the new model Hinds with chin turrets mounting twin barrel 23mm cannon but that gun is the same as the twin 23mm gun of the MiG-23 and MiG-21 and the six barrel gatling of the MiG-31 and Su-24 and fires a much lower velocity heavy shell that is 23x115mm. This enables it to be used at high rates of fire with a potent effect on target with its HE charge without enormous recoil or taking up too much space on the platform.
A while back they showed a towed mount with an enclosed cabin and four SOSNA missiles ready to fire and a single twin barrel 2A38M cannon from a Tunguska (which uses two of these guns). Longer range, 2,500 rpm so comparable rate of fire to the twin 23mm mount but heavier projectile and already in use on Havoc and Hokum and Hind helicopters as well as Tunguska and Pantsir as well as BTR-82A APCs, 30mm RWS for vehicles, and of course BMP-2 and 3.
They would retain a gun mount but it would use standard ammo already widely used and have better performance.
So a ZU-30-1 technically.
Heavy calibre guns are a useful way of stopping an attack before it fully gets going... the Americans knew that from Vietnam with Vulcans in the Jungle...