Hi all! I've got a 2012 cMBP 13" (Intel i5) around which is still on El Cap. It's got 16 GB of RAM and an SSD and it runs absolutely beautifully. I haven't bothered with upgrading until now, since I'm not particularly interested in features like Siri. Do I need to fear any loss of performance if I decided to make the jump to Sierra? Or does it perform the same as El Cap, now that it's been out for a while? Thank!