My 2010 15 inch MBP is still getting OS updates. Installed 8GB of memory and an SSD a few years back. Other than the fact that 1.5 hours is about all I can get from the battery, I haven't been compelled to upgrade.

Sure, a 2 year old macbook isn't that old. I think they support them for 4 or 5 years so you're about half your life time there. Good for now but not really sustainable long term.