My 2012 MBP i7 have been running 24/7 for the last 7+ years and still rocking. I have replaced a swollen battery and weared-out SSD after its 6 years old, which is inevitable, and lucky the 2012 MBP is totally serviceable. Now I am looking at the market with non-replaceable battery and soldered SSD - thinking my MBP 2012 may as well last longer than those new boys with premium price tag....