We've used Google Appengine for over ten years now. It was the first service to abstract infrastructure, so developers could simply deploy code without worrying

We've used Google Appengine for over ten years now. It was the first service to abstract infrastructure, so developers could simply deploy code without worrying about scaling and redundancy. Google's edge (for us) is reliability. Over our ten-year tenure (heh), there have been a handful of incidents when our service was down, most early on before the NDB datastore. I seriously can't remember how many years it's been since our service was down. And when Appengine does break, they do a brutally honest report about exactly what happened, and how they are going to make sure it never happens again. If you've got the interest and time, it's worth searching for articles/videos about Google's SREs. They are fanatics. I know this is anecdotal, but AWS and Azure seem to have multiple outages a year. Every time I'm immensely relieved to be on Appengine.