Yeah, I was disappointed they did not bring night sight to older iPhones. Google has made night sight available to all models of Pixel phones.
Also, if you're going to share a photo, you're likely going to do it the same day you took it.
About 60-75% of the time I take photos, I share them soon after or within a few hours. Having to wait to let them be processed overnight would be obnoxious.
And it's not particularly helpful to compare people taking photos on their phone to the DSLR world. (Coming from someone with a nikon d200, d300 sitting on his shelf). Totally different use cases, totally different usage expectations.