I have finished sharpening the dedicated plane I made yesterday. Here's a quick image of the result.
Three quick points:
1. A custom router bit is cheaper.
2. Setting this profile onto an edge, however, will always be a 5 minute operation from start to finish. Compare that to the time it will take you to set up a router table and then sand.
3. The making of this plane speaks well to the versatility of hollows and rounds. The sole of the plane was made with them. The profile itself can be made with them. There are scores of additional profiles you can create with just them and an incalculable amount that they could be incorporated into.