Disclaimer: I wrote for
IFR and have been a member of the
Pilot Workshops team since 2016. I was a subscriber to both before I became a participant.
With
IFR magazine gone, unless someone creates a similar publication, I think the best you will see in a
publication is the periodic IFR article in Flying. Some of those have been reprints of
IFR articles (last year I was surprised to see one of my old articles there).
For subscription-based online "edge cases," the best bet is Pilot Workshops (which, as already mentioned, is now part of Sporty's). One of the best parts of that is, a subscription to IFR Mastery gives you access to all 178 (so far) scenarios. And I've heard comments that the best part is the roundtable discussions where we sometimes disagree with each other and sometimes (especially when there is a clear "correct" answer), use the scenario as a jumping point to a related issue or technique.
A new offering from Sporty's is
IFR Focus. As it mentions, subscribing (free; and only for the emailed newsletter) includes a
Practical IFR email written by Jeff Van West. Jeff is a former editor of
IFR and is the driving force of the Pilot Workshops training content.