My car is parked in an underground car park and is driven once a week for 23 miles. So not exposed to the elements. On my old car which was first registered in November 2007, I was advised to replace the original Continentals in May 2017 when my car was in the tyre fitters for a reason that I can’t remember.
They ended up fitting some Chinese tyres which I wasn’t happy about but they caught me off guard. Now I know what tyres I want Michelin Primacy 4 and I will ask for those when the time comes unless the Michelin Primacy 5 are out by then.
I have even got some quotes of £387 to £397 for a set of four fitted which isn’t bad by all accounts. That’s probably because they are in a smallish size.
23 miles a week? The Chinese tires are fine for that, I wouldn't worry