I got a year-end 2018 SLR6 last January to replace my 2010 Roubaix with a seized seat-post. I’m 68, and I doubt I’ll live to ride long enough ever to buy another bike again. I like the bike a lot, but for stupid reasons—the internally routed cables, the wider tires, and most of all, the black on black lettering that makes it hard to see that I’m riding a Trek.
But to be honest, despite having ridden the two bikes over 25,000 miles, if you gave me a blind ride test (blind as to the bike, not blindfolded, wise guy), I don’t think I could identify which bike I was riding.