I had Samsungs every year from the Galaxy S2 until the S6, but the battery was simply not fit for purpose so I got a One Plus 3. Since then I've had OP5, 6 and 6T, but didn't go for the 7 because the 'pro' had ridiculous glare on the curved screen and weighed a ton.
I know the OP8 is out in a couple of months, but it's likely to still have a curved edge (I watch a LOT of tv on my commute and there's a reason your telly isn't curved at the top and bottom).
I was really impressed by the display on the A71 side by side with my OP6 so am tempted to come back. At least if I buy from Samsung direct there's a no quibble 28 day return...
That's my nervousness. I'm used to really fast phones. The A71 was definitely slower than this one, but still seemed pretty nippy, so I'm struggling to justify the extra £160.
I did have an A5 for a short while, which was essentially the S7 with a slower chip and was a fine phone.