I'm debating whether I should trade my beloved 2016 Fiesta ST. It is arguably my all time favorite DD car. I've put over 40,000 miles on my FiST (bye warranty). Fiesta ST is going out of the production and 2019 is the last year. I'm considering forking over about $10k after a trade in for a brand new 2019 Fiesta ST (with a back-up camera). I'd hate to part my 2016 Fiesta ST which has been trouble-free all those miles. Should I? Shouldn't I?