Maybe I'm just doing something wrong but the two times I've used Logseq, I've managed to horribly destroy a page by breaking some special formatting which has made me back away in horror, thinking I could accidentally break my database sometime.
I experienced the same when I first started using it. It was a bit unstable and you had to tread with caution. There has been a significant amount of updates and the stability has improved massively. The local storage option also means that there is less risk of something going wrong than with the GH sync - at least I have found it to be a lot smoother.