The radial arm saw (RAS) is not very popular. Some issues are that they are bulky, they are not as accurate/consistent as a compound miter saw and they are inherently dangerous. The pros are that you can get a high quality (used) one cheap, they generally have been lightly used by the previous owner, they are robust, they are great for repetitive cuts and they are versatile.
I've had 4 of them. Currently I'm using a 1968 Craftsman 10" RAS. A couple of years ago, I looked at a 1957 Rockwell RAS. I was impressed with the quality, but the seller & I couldn't agree on price.
To address the above issues about the RAS:
1. Bulky; Yes but they aren't flimsy.
2. Not accurate/consistent; You can tram a RAS. They're youtube videos & books that will guide you through the process. Maybe not "tool & die" accurate, but good enough to cut molding.
3. Yes they are dangerous. I mentioned that because of a recall of Craftsman RAS. IMO, everything is dangerous if you're careless.
With mine I use it for repetitive cuts, compound angle cuts & wire/rag wheel cleaning (with a drill chuck attachment on the back of the motor). I'm sure that they're valid arguments on not buying one, but for the 30$ that I paid for mine, it was worth learning to use it properly.
Happy Trails!
Edit: Your pictures got posted while I was writing my reply. That looks like a good restoration project. Check out the vintagemachinery.org website for some great photos.