I've stuck with 1Password for a long time, because it will work on the occasional Windows machine I need to use. However, it doesn't integrate as well as Apple's native key manager. I've been on the fence about just giving it all to Apple, but it's, like, the one thing out of literally DOZENS of services that I use that Apple does NOT control, and it's kind of important. So I'm really conflicted about the whole thing.
Considering the same but keychain always feels kind of like it’s forgotten about with one person in a dusty basement at apple working on it. Importing is weird and convoluted and requires some third-party scripts. I don’t get why they don’t just leverage their unfair position and access to private apis to make a really polished first party password manager.