I commute up to 650km a week in a 2010 V70 T6 which shares almost its entire mechanicals with the S60 T6. I have put almost 70,000km on it with regular scheduled servicing at Volvo.
Soon after purchase at ~205000km I had Volvo do the 210,000 service, fit an accessory belt, tensioners and idlers and coupler; new PCV; transmission fluid (and have replaced at every 30k km roughly). At about 240,000km it developed a minor coolant leak so I had the radiator replaced at a third party workshop (which was a bit of a disaster as they used the wrong coolant and the waterpump died within a week), followed by the waterpump at Volvo. So fit a pump when they do the belts.
The steering lock has failed open twice, so I have fitted an emulator (I would do this straight up, it is not a fun job to access and free the steering lock, it strands the car, and it isn't really a mileage thing).
I have also replaced the washer line to the headlight sprayers as it cracked in multiple places, it was a garage doable job and a fairly cheap part; that seems to be an age thing not a mileage thing.
I have cracked two Ixion 18x8 rims (and one had been previously repaired), probably an issue if you do lots of bush miles or ever drive in Victoria 😜
But that's in 70,000km on mostly country B roads, with a car bought at 196,000km. It has been an extremely reliable car. Inclusive of the radiator it has been down for 3 days in total over 4 years. Even the economy has not been as dire as everyone likes to imagine it would be; I typically sit around 8.4-9l/100km. It has the earlier motor which is reputed to have oil consumption issues, it uses (it doesn't leak) about 0.5l between oil changes out of ~7 litres and I am comfortable with that.
At your level of mileage you are (many!) years away from most of this stuff. As everyone has said though their will be age related stuff you will need to get on top of that will mostly cause inconvenience.
