technology

I'd expect infantry scale railguns instead tbh. A naval railgun has to somehow be better and more logistically efficient than a missile rack and its ammunition and the current trend is for those to get cheaper and more effective. There'd need to be some kind of breakthrough in anti-missile systems that makes "just send more cheap missiles at a target to overwhelm the defenses/exhaust their interceptors" no longer viable, like a laser CIWS that actually works in practice, in order for "how do we make big artillery pieces work better?" to make a comeback.

At the small scale, it's possible the issues of railguns ruining their barrels could be solved, but it still needs a good answer to "why are you not just using conventional propellant?" and now "why are you not just using an anti-infantry/anti-vehicle drone system instead?" Since railguns are more efficient than coilguns, it's feasible it could end up working as an integrally silenced weapon (and stealth aside, reducing volume is good especially indoors because it reduces hearing damage for everyone nearby) although coilguns would probably win out on reliability.