I got aphantasia from Covid, apparently it's an extremely rare side effect - so rare I've only found a handful of people on the entire internet who've experienced it. So I happen to know how it is to live both with and without the ability to visualize, I used to be extremely good at visualizing. Most major impact (apart from the loss of ability to daydream) is that my memory is worse, as my memory was very much based on playing back memories as movies in my head. Especially childhood memories suffered. Also reading books is a very different experience, as when I previously would make up movies and picture the characters visually when reading, now it's all black. That said, reading books is still an enjoyable experience, it's just very different.
I also stopped dreaming in images for a long time, which was weird. It's still very dim (not so vivid), but at least that part came back.
I also stopped dreaming in images for a long time, which was weird. It's still very dim (not so vivid), but at least that part came back.