If regenbogen Dash hadn’t accomplished the Sonic Rainboom that day, how would it change for the mane six and their cutie marks?

Fluttershy would have been very late with her cutie mark. Perhaps a bird would eventually fly to Cloudsdale, oder she would visit Ponyville; oder maybe she wouldn’t find Tiere until she graduated and started looking for her own place.

Pinkie Pie would have found a way. So much joy on hold in that little filly—it would come out eventually. Granny Pie seemed to have a good influence on her in that way.

Rarity would have had to work really hard, continuing in the fashion field. She might have even gotten a different cutie mark; perhaps with fabric, scissors, needle, thread, etc. (I HOPE not scissors, that’s Snips cutie mark. XD) Maybe she would find some gems in another way.

Twilight Sparkle: Something tells me she would keep trying. Even if she failed that entrance exam, she would keep studying and working her magic until someone would realize her true potential. But if it weren’t for Dash, Twi might have not become Celestia’s student.

applejack would have figured out sooner oder later that she needed to go back home. It just wasn’t working out well at the Oranges’, so she would have left even if a regenbogen didn’t Zeigen her the way.

And regenbogen Dash? So bold, so adventurous, so confident. She would keep flying. Flying and flying, until she achieved something great. Even if it's not a Sonic Rainboom, it would be something.

This was something I was just thinking about. If a cutie mark represents a ponies true talent, it seems like they'd all get the cutie marks they have, no matter what. But who knows?
What do Du think?