Replace, repair or leave alone?
This is the door sill for the front of my 1919 house. The square nails lead me to to believe it's the original wood sill. If this were your house, would you replace it?
If replacing it is a bad idea from an old house point of view, then what? I could do a credible job of filling in the cracks and missing areas with wood filler, but doubt I could stain it well enough to pass for wood. I'm thinking of just leaving it as is, staining and topcoating with a sealer. I have adjusted the door so it isn't rubbing the wood.
(I scraped the paint off the threshhold at the top of the photo. The paint plan calls for that to be painted green to match the door frame, but if I can get all the paint off, I might stain and clearcoat it.)