It's an ongoing phenomenon that the auto show circuit is altogether losing its luster.
Auto shows served two purposes: get cars in front of journalists to write stories about them, and get cars in front of potential customers so they can see a bunch of different cars together.
However, Apple (in the consumer electronics space) has proven that you can get journalists to come to your event, instead of you coming to the journalists' event, if your product launch is noteworthy enough. And, then, because it's your event, you control the news cycle in the aftermath of your event, getting as much as a week of coverage, instead of the mere article or two a show participant gets. Tesla's copied that model for the automotive space, and then other automakers are slowly copying it themselves now.
Getting cars in front of potential customers is another story, and that still has value. However, that doesn't need a huge manufacturer booth - a lower-cost display done by the local dealers can do that.
European regulators and lawmakers care a lot more than, say, American regulators and lawmakers about vulnerable road user safety. So, this means that a higher standard (or really, a standard at all) of protection for vulnerable road users is demanded, and when injuries occur, awards for the victim are both more likely and higher (in contrast to American practice of victim-blaming the vulnerable road user, sometimes even to the point of fining them for something that's the motorist's fault).
This means that the pedestrian safety features are to an extent mandated, and going beyond the minimum reduces liability insurance rates (due to a lower risk of paying out, and a lower payout, for the insurer).
The Internet.
Who wanna pay $10-$15 to visit an auto show anymore ....
... even Victoria Secret fashion shows & Playboy magazine have lost their luster