I was one of those diehard Evernote users who defended Evernote and I posted several times in the power user thread you referenced.

They they pulled a major feature I and others had put a lot of time into - shared notebooks. I was using these to create time management coaching notebooks for my clients. Evernote did put it back when we complained, but this just showed me the danger of relying on a company that could just arbitrarily delete a feature used by many users without notice.

At that point, I moved entirely from Evernote to OneNote and haven't looked back. I do miss the vibrant Evernote forum, but OneNote supports the way that I am sharing notebooks. I did find a better OneNote forum here:
https://plus.google.com/u/0/communities/117204050916106398006

Not up to the level of the EN forum, but people are very helpful there.

dan7000 wrote:

For years I have been hearing predictions of EN's demise only to see it
get bigger and more popular.

The thing that has convinced me recently that EN as a personal product
(as opposed to some business collaboration platform) really could be
dying was this thread on the EN forums:
https://discussion.evernote.com/topic/66103-power-user-discontent-best-alternatives-to-en/

The key thing about the thread is that participants include forum
members who for *years* have been absolute 100% EN fans. People like
BurgersNFries, who were crowned EN "evangelists" by the company and who
monitored the forum constantly answering questions and coming out to
attack anybody who dared to question EN's product trajectory -- and who
now says she is abandoning the product for OneNote. A number of others
on the thread have also been huge EN supporters or at least hugely
involved in the EN community like JMichael and jbenson2. Now all of
them are looking for alternatives.

When you lose your biggest fans -- and when they publicly use your
forums to talk about how best to abandon your product -- that's a sign.