Well, I'm not (yet) a MRH subscriber, so maybe my view isn't pertinent... However.
Last thing I ever subscribed to was Linux Weekly News, LWN for short, to the tune of about $5US per month. It is in the format of a blog with comments, very pertinent when I was teaching, but my attention span gradually dwindled to where I just decided not to renew. Still check it daily for headline tidbits, sometimes wish I'd just had kept paying, but not enough to do something about it.
I subscribed to Model Railroader for a long time. Finally stopped that when I realized they had abandoned all hint of real scratchbuilding; now, my collection is a file box of articles of interest to me, a large boon in much needed storage space. Most recent dealing was with the K-27 drawing from a IIRC 1992 edition; fellow wanted a copy, but I couldn't figure out easily how to make a clean .pdf, and decided it wasn't worth the effort for the exposure to claims of copyright infringement.
The only paper periodical I still get is the monthly Friends of the Cumbres and Toltec Dispatch. Chris James does a great job of assembling a publication with both current events and history articles. Due to my frequent attendance at work sessions, I'm usually in one or more pictures in each edition, I use these to show my wife I'm not just hanging out in the bars. They're only about 15-20 pages each, so storage isn't an issue, yet.
While doing research for my doctorate, ran across a self-published periodical about software maintenance. A lot of good information in that 5 or so years of existence; when I finished my degree I worked to get the publisher's collection moved to a library. I hope they kept it.
There's a lot of useful information that collects over time in forums like this; I was recently compelled to leave the Narrow Gauge Dead Goat Saloon running for a time to afford a history researcher to do his thing; we get maybe 2-3 posts a month, and there are other more-active forums in the genre, so $40US/month for webserver is just not worth it. Narrow Gauge Discussion Forum is the go-to for that subject; all the authorities the world over post there, and it goes back decades, covering discussions including folk long-passed.
I guess what I'm getting at is that how we communicate has changed. I do miss reading a morning paper, but I get the news I need quite easily over the internets. Forums like MRH collect a lot of useful information, sometimes more than once, but that's a side-effect of the medium. Articles IMHO are still quite useful; evolution in to blog posts is not a bad thing. What's critical to whatever we move to is the ability to retain the corpus for future access. That was fragile enough with periodical media, probably a different sort of fragile with digital media.