It's been a year since I upgraded my laptop to an SSD. I know this because I added a reminder to my calendar at the time to remind me that after 1 year it might be worth swapping it out. Why? Because I read some horror stories regarding their reliability and expected life-spans (most died within a year in the cases highlighted here).
My plan was to change it after the first year. Should I though? Seems a crazy thing to do. considering the cost. But then, if it did fail, I'd curse myself for not having done so.
You can now get 512GB SSD drives, which you couldn't a year ago. Although they're not cheap. Crucial's is going for £500 on Amazon! If I did swap it then I'd remove the slave spinning-disk HDD from the laptop and use the "old" SSD there - making it a twin SSD laptop. So I wouldn't throw it away or anything daft.
I'm not sure what to do though. The laptop itself is now getting on a bit. It's nearly two and half years old! Seems ancient to me. Although, because I gave it 8GB of RAM and look after it (don't install anything other than the essentials) it still feels perfectly adequate. Again no good reason to change.