After four great XC70s, I’m very happy with my V90CC.
Even the slopier tailgate has not been as inconvenient as feared - the only slight downside I can think of.
I have no towing experience but would not recommend the D4 anyway - it’s adequate at best, underpowered at worst (IMHO - others may disagree!), so go for a D5; noticeably more power, little difference in economy or emissions.
And if that’s still not enough, just add Polestar! - I was very happy with that set-up - until, with my slightly declining mileage, I got tempted by a naughty little T6 - with Polestar, of course...
If equipment/options matter, be aware that quite a few advertised as Pro models are not.
Quick visual checks are 19” wheels and front fogs; internally, stitching on tailored dash & doors cappings, and 12.3” driver display (two main dials).