It may be regional, but I can confirm that at least in the USA, the modern Volvo PHEVs do make an artificial noise sound while travelling at low speeds on electric-only. It sort of sounds like white noise, not alien mothership like some car brands!

 

This has been a thing since the very first EV. Was it the Prius? Don't remember the exact car, but yea, people were up in arms over it. "Blind people can't hear cars!!!" they said... someone threatened to sue someone and here we are: US EV's make fake noises.

 

So I would be happy if the Volvo made a pleasant sound, but apparently it doesn't in the EU, or at least I haven't heard one yet.
And I find it dangerous because people don't expect a car to be coming and are often startled. On the other hand, bicycles, e-bikes, or scooters don't make sounds either, and they can go quite fast too.
I've already startled quite a few people with it; once I think I rolled behind someone for 2 minutes... until I then pressed my mode selector to Polestar, thanks to the Bastuck with open flap in dynamic mode (and especially cold start is quite loud) - he really got a fright then

Those spaceship sounds are crazy - I find them very embarrassing. It would be an exclusion criterion for me not to buy that electric car; the Tesla one also sounds pretty weird.

 

Personally I wouldn't mind something that emulated the sound of ICE.