I don’t understand all the love for silver wheels. They’re just so common!
They're not though - at least, not any more in the context of newer cars. It is becoming increasingly rare to find a new car offered with silver painted wheels now. Even your car was never offered with silver wheels - all of the 5 Series M Sport wheel options from 2017 onwards were either black or two-colour (Of which one of the colours was either black or a dark grey). There were no painted silver options at all, the closest you could get was the diamond cut face on some of the options.
Silver wheels work because silver is a light colour that allows you to see all of the detail of the wheel really easily and a good wheel is about detail. Black works on other areas of the car, particularly as the main paint colour or as trim around windows and doors but as soon as you paint the wheels black you lose most of the detail of the wheel - it is often difficult to tell what wheel style a car has fitted if they've been painted black.
As well as this, 95% of people don't obsessively look after their cars so quite quickly a black wheel is surrounded by, and highlights, a brown tyre and kerb damage is all the more obvious.
It's clearly an increasing trend and it's obvious that those of us who don't like them are in the minority - my recent car search was made much more difficult by the fact the majority of the cars were optioned with black wheels - but they really don't look very good and cheapen the look of every car they are fitted to. Unfortunately I think your 5 Series is a particular example of this.
In summary, I'd probably flip your point around. It's black wheels that I can't understand and that appear to be more and more common and fitted to everything now.
It's not like black is the only option for those who don't want silver. My car doesn't have silver wheels either...