I'm currently running OPNSense on one of those small N95 devices as a Virtual Machine, as my primary router/firewall and DHCP server for my (recently setup) handful of VLANs.

Whilst I have backups of the VM itself, as well as backups of the OPNSense configuration at various different times, one of the things I'd like to have is a cheap, drop-in device that is able to do all those same things. Having a hardware device that runs OpenWRT to do this would, as far as I can tell, be perfect for this, since OpenWRT's configuration can be backed up and applied to another device (I'm sure there are some traps for young players in regards to interface names etc. but I'm also sure they're not insurmountable). So any device that can run OpenWRT that has the hardware capacity to keep up with my setup, is drop-in-able.

An additional benefit of this is that the same / similar configurations can be deployed to various friends and family for both secure networks and relatively quick, easy, and cheap replacement in the event of hardware failure.

... and possibly sellable as a device and / or service. Basically cheap option: OpenWRT on compatible off-the-shelf device, expensive option: OPNSense VM on mini PC.