They threw everything they had at it today, and it just bounced right back up at the end of the day. They're on the wrong side of history. I grant you, they are one stubborn bunch. Some catalyst will come along and it will obliterate the shorts similar to the VW & Tesla short squeezes. I'm certain of this.
VW at the time of that epic short squeeze actually only had about 13% short interest. RIMM has much more, but I don't think the squeeze will be nearly that dramatic.
VW was an extreme case. Porsche managed to scoop up 74% ownership, and the German state of Lower Saxony owned another 20% (and couldn't sell without a vote). That left only 6% of the float available for sale.
It's only a matter of time before the RIMM shorts get squeezed, but there is a lot more of the float that will be available for sale. If you think RIMM is going to suddenly go to $100/share, you'll probably be disappointed.