That really depends on the service you're looking at and what your needs are. Google probably offers the best all-round package, but depending on your needs, there are often times good or even better alternatives available.
As far as I know, address completion is supported by almost every alternative. At least I don't know of one which doesn't support that.
The quality of directions not only depends on the product, but also the method of transport you want directions for and the geographic region your targeting. For example, Google is, in my experience, very good for cars, but terrible for cycling. At least in Europe, OSM based maps generally include far more paths and details, which, combined with a good routing engine, results in better routes. I have made very good experiences with OpenRouteService.
For SteetView-like images you're unfortunately pretty much limited to Google or Apple. Mapillary exists, but, as it's crowdsourced, quality and coverage just aren't all that great.
I think that there's a good open alternative for most use cases of embedded maps available, as few of them really need StreetView or traffic-based routing. If that's the case, though, you're unfortunately stuck with Google or Apple.
Die Zahlen gehen heute sehr weit auseinander. Die Polizei redet inzwischen von 80.000 Teilnehmern, während die Veranstalter von 250.000 sprechen. Die Wahrheit liegt meist irgendwo in der Mitte.
Edit: Inzwischen spricht auch die Polizei von immerhin 160.000 Teilnehmern.
Ich war da und kann sagen, dass es auf jeden Fall so voll war, dass man endlich mal wieder ein kleines bisschen Optimismus tanken konnte.
Ich hoffe, das Momentum bleibt bis zur Wahl erhalten und schlägt sich am Ende auch im Ergebnis nieder.