In the last six months I've noticed significant sluggishness in the performance of my 2012 MBA. I chalked it up to Sierra/High Sierra, but I recently downloaded SSDReporter out of curiosity and it states my drive is at 38% health, which according to the app is the "warning threshold." Is this something I can take seriously? I didn't think a 5 year old SSD would already be so degraded. Is there any other way I can check the health of my SSD? And if it is failing, would popping a new one in solve a lot of my performance issues?