I have the late 2014 MM with 16GB/RAM 512 SSD and just ordered Apple refurbished 2020 MM M1 base. Now Im second guessing my decision. Now that I think about it it seem just like a waist of good money. The only issue I have with the 2014 MM is that it's stuck with Monterey OS (no hacks for me). 9 year old computer (2014 MM) sounds so old!