Re: PowerPoint! Word! Excel!
As a writer I use whatever is available when an idea strikes.
I was once out in Glasgow when an idea for a story arrived from nowhere, I convened to a nearby hostelry (it being Glasgow there were many nearby) and set about tapping the first 1,000 or so words of the story into Word on my phone.
Whilst I would never have considered publishing this story as is, there were far fewer typos than I expected when I edited it on my laptop later...