I upgraded to the 8 too in 41mm, since the price difference between the 7 and 8 is not that big and 8 has it in Silver, which is not available Would of considered a SS Series 7 if available refurbished from Apple, but they didn't have any in silver, so I just opted for the 8. I'm coming from a Series 4, which I had since December 2018 and almost had for 4 years.
While it looks mostly the same looks wise, which makes it appear I didn't upgrade, the always on display is nice and the bigger screen. Also, a fresh battery is good as with my 4, it goes down to 20%-10% with minimal usage and my battery health is like 81%. I guess the time is now to upgrade. Didn't opt for SS as the extra $300 isn't worth it since Apple Watches depreciates a lot unlike actual watches. I do want to get the nicer Apple modern buckle band, which will go well with silver aluminum later on.