it's getting a little long in the tooth... so i'm looking at replacing the battery, which i expect to run around 120$. i've also had some suspicion that there is a problem with the ssd since i got it, but lately i've been having semi-regular crashes (2x/week or more on heavy use). i've read through the crash logs and can't isolate any specific process. it also runs hot with the fan on almost all the time. is this machine worth bothering with a battery replacement? pretty sure i don't want the new macbook, but if a new air is released next year i could probably wait until then.