Thanks!
Whats a reverse silo?
A reverse silo is when you build posts to the support pages rather than the homepage. The support pages are also easier to get links to because they're almost always non-commercial and helpful in nature.
The structure of the reverse silo is more or less the same to be honest. The only difference is that you link to the support instead of the homepage.
One thing.
What's the difference between a regular wordpress website without any tweaking and a siloed wordpress website after tweaking?
I mean, isn't wordpress fundamentally a silo strutured CMS?
Homepage > Categories > Posts within the relevant category.
The only thing I'd change on some themes is that some of them have a "most recent" posts on sidebar which pretty much ruins the contextuality. IMO having a sidebar plugin to show posts relevant to the category the current post you're in is even better than doing only the type of siloed shown in OP (where the posts themselves only link to homepage / parent AKA category)
wordpress is definitely not a silo structured CMS
Posts have multiple categories and tags. Then you have author pages and archives.
To make matters worse your category and tag pages are just big lists of links full of duplicate content. When do you ever see a category page ranking?
Companies like yoast will tell you things like
from
https://yoast.com/category-seo/
Well, really, yoast?

I wonder if that's actually true, or if you're just writing crap to sell your premium plugin. ;-)
Now, yoast.com is a pretty damn powerful site, right? No one will disagree with that. Not only are they powerful but they are the damn authority on wordpress setup for SEO and they have just told us that category pages are more important than individual landing pages. Their setup must be flawless.
Ok, let's check out their category pages on ahrefs.
https://yoast.com/cat/content-seo/
https://yoast.com/cat/wordpress/
https://yoast.com/cat/seo/
They look nice. They've got custom headings and titles, some unique content up the top, some contextual links in that unique content. Sexy stuff.
But are they just dressing up a turd?
Well, what do we have here..
3 of their biggest category pages, each with a damn hefty chunk of backlinks from a lot of unique referring domains. Their SEO cat has 490 from 196. That's pretty solid.
13 keywords and 30 traffic on content-seo? 75 keywords on their wordpress cat, and only 46 on seo with a mere 675 traffic.
Pretty abysmal. If yoast.com, an authority and expert on SEO and wordpress, author of the most popular wordpress SEO plugin can't even rank their cat pages on a site that has 65 trustflow and 70 Ahrefs Domain Rating, then that's telling us something pretty damn obvious IMO
On the other hand here's a piece of content with a similar amount of backlinks and RD.
But, yes, yoast, category pages are your most important landing pages that should be ranking ;-)
Back to the real world.
If you're going to use categories/tags for users and menus, then noindex them and just link contextually within your content. You don't even need a menu structure. If you have a blog with 200 articles, create topical groups, let's say 20 groups of 10. 9 of those articles link contextually to the "parent".
Go one step further and create a custom menu for each group, so each page in the group of 10 has a menu at the side with the 9 other pages, and the contextual link to the parent.
Siloing isn't just about having a "tree structure". It's about creating topical groups.