My assessment is more negative and my advice is to replace all the standing rigging, unless you know that it has been replaced in the last 10 years. At 15 years swaged rigging should be replaced. Sometimes you can see a crack develop in the swage, but for most cracks you need some penetrating dye (which is still not conclusive) to see it. Inside the swage, especially at the bottom, rust can develop (I notice some on your pics) and destroy it internally. You have not seen the swages at the top of your mast. Another issue is chainplates: they rust exactly at the spot you cannot see (where they go through the deck). Take them out, and visually inspect them. The attachment points of your jib need some work too, but that does not keep the mast up, it seems. Blowing that out, will not be disastrous. Finally, there is a lot of rust on your turnbuckles, which makes me wonder about the quality. I have seen them turn green, with some kind of brown color, but not with this layer of rust. The fact that there are no toggles could be an indication that the whole setup is sub-standard.
So, this comes from someone who is sailing in the SF Bay Area, where it blows at least 20-25 knots every afternoon in the summer. I want to make sure my rig is ready for that. Yet, it does not take 20 knots to take down a rig. 10 knots combined with a good swell, combined with the wake of a ferry will put some good pressure on the point that is about to go. I do not buy the argument that you should go sailing rather than work on your boat. My boat is far from a shiny impeccable vessel (not that there is anything wrong with that! I love looking at them) BUT safety should always be a priority over going out.
So, replace the rigging!