The way it was explained to me is that because you do the same thing so often that your brain just removes it from your memory. It’s mostly seen with a daily commute or something.

Just to make number go up at the moment. One day I’ll want a new laptop but mines new now so maybe in like 5 years.

I’ve been told it’s normal to just not be present for drives you have done a ton and are extremely familiar with. Still feels weird when I realise I’m basically at my destination and don’t remember anything about getting there.