Reddit scrubs the identity out of many communities/topics. I have found much deeper and meaningful discussion on focused forums. For almost any topic with any significant interest there is a non Reddit forum or community that is deeper and more customized. Not always, but usually. Just support those communities and forums. Example, mtgsalvation is by far better to visit for meaningful MTG deck building and discussion…
I've been forcing myself off Reddit and to search out specific forums and sites. It's an old (I meant odd) mix out there, some have obviously been using phpBB for years, some are brand new with lots of mechanics, and some are tied into other sites that have drastically helped my hobbies.
For Reddit, besides the time-sink/image click portion, it doesn't hold much water for indepth hobbiest communities.
The short life of a post and terrible search result in a large portion of each sub being the same post, iterated daily. You don't get around that with a forum BUT, and this is important, forums for these hobbies are often attached to sites specific laid out and updated so you see the bare basics before getting to the forum. Subs can have a sidebar all they want but it's clear a lot of people gloss over it daily.
EDIT: The more I think on it, the more Reddit has splintered into subs and their sidebars/communities just being single login web rings/forums.
Specific example, numismatics
There's /r/coins, coins4sale, papermoney, colonialcurrency, banknotes, maybe 50 more. In reality there's a few main ones which are easily grouped together on a dedicated site similar to Numista's forums