should I update Android?

Hello,

I wasn't sure which section of the forum to post this in. I would've thought an Android Questions section but I didn't see one. Hopefully this works as well.

I just bought an HTC M8 from Craigslist. It's been going well so far.

It's running Lollipop which is what I was using on my last phone as well. I'm wondering if I should update? I haven't gotten any alerts to do so for some reason. I don't know what the pros and cons are. I'm guessing updates slow down the phone (if the phone...

should I update Android?

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