@Sudsrung0 @Anonymous
You are right about the bombardment of messages, but I think it probably depends on how guests have their notifications set up. A lot of guests have notifications turned off completely and don't even realise it. The App notifications are also kind of glitchy. Some guests completely forget about Airbnb once they have completed a stay and will just ignore any notifications.
I don't normally chase for reviews, other than an occasional casual mention when I am seeing off a guest in person, but even that is rare. However, I do know how frustrating it can be for a new host. In the beginning, I did gently remind guests (but only the really nice, friendly ones) and none of them seemed to mind. Almost every guest left a review. When I stopped doing this, the percentage of reviews left went down considerably. I feel like a lot of guests are happy to ignore Airbnb's reminders, but if it is the host who is asking, they are more motivated to do it.
It might not work as well if you are a remote host that never meets guests in person though. My guests are staying with me in my own home, so they view reviews as more of a personal thing than just another chore to do.
There are guests though who just aren't going to leave reviews. In my experience, male guests are less likely to do it. I don't know why, but every female guest I've hosted in the past few years has left a review, whereas several male guests have not, and females make up a far higher percentage of my guests. I would say around one in three male guests do not review. The only female guests I can remember who didn't leave reviews were the ones who were really problematic during their stays. Not sure if anyone else has noticed it?