You'll be glad you did. I loved my 2015 MBP. I even drove 3 hours to the nearest Best Buy to snag one. That display was glorious. A fantastic machine. I eventually gave it to my sister, who continued using it until a few years ago. The battery was gone, but it still worked great.

When you upgrade, prepare to be astonished.

The performance improvement is difficult to convey. It's akin to traveling by horse and buggy. And then hopping into a modern jetliner, flying first class.

It's not just speed. Display quality, build quality, sound quality, keyboard quality, trackpad, ports, etc., have all improved considerably.