> Having the tools you’re using vanish would stop anyone.

No. Not really. Depending on the presentation, it wouldn't stop professionals. More importantly, this is why you have backups. It's why you don't wait until the last minute to prepare your presentation, or, if you have to, you are knowledgeable enough to forego the presentation.

Simply put, in this case, absolutely not.

Edit: And to be clear, before you put too much weight on the "depending on the presentation" part, data heavy slides are not what I'm talking about.