Same experience here.
I was die hard fan of obsidian till I used Logseq.
Obsidian doesn't have proper outlining as they have another commercial app called Dynalist.
They probably don't want competition between their own products.
Lack of folders in logseq is a feature.
It force the user to follow zettelcasten style which results in serendipitous encounters with older notes.
You can do exactly the same with Obsidian, just don't create any folders and voila!
Nits aside, I use both and sometimes folder structure came in quite handy (like having separate notes for course modules and having 15 topics). I wouldn't remember even the names of these topics to come by when I need to.
But I agree also that the magic in Logseq happens more often than in Obsi (rediscovery). I think what contributes to it is the atomic nature of blocks as opposed to pages and daily scroll of all topics encountered recently.
nicknames cannot be used as tags since it doesn't support auto complete/filter by tag etc.
You should really check out FF tag system.Its really awesome.Vivaldi doesn't stand a chance.
https://www.youtube.com/watch?v=jRIyAu79OrM