From what I hear, SSD manufacturers will say that their SSDs can withstand approximately 10,000 hours of operation. That comes out to about 415 days–or a little over 1 year–if you’re constantly writing and rewriting data to your SSD.
It comes down to how much you use your computer. Are you doing a lot of data-intensive work, like video editing? Do you regularly move around big chunks of files (movies, tv shows, music, etc.)? How often do you install and uninstall and reinstall big programs?
The more data you manipulate, the faster your SSD is going to die. You can probably expect to squeeze a few years out of it, but “decades” is much too long unless you only plan on using your computer once a week or something like that.
Because of this i hesitate buying ssd for my pc.