I loved ember for years. Even attended EmberConf in portland around 2015. In fact, I'm just weeks away from retiring my last ember codebase that was in production and worked great for a decade (but I haven't updated in 5 years, since I was unable to keep up with all the changes). But after years of the community dying the most slow and boring of deaths, and having an absolute nightmare needing to hire Ember consultants, I really soured on it.

It is the main reason I completely stick to the boring mainstream (like react) now, so I'm never again stuck between "nobody knows Ember" and "this one consultant is charging $28k a month cuz I'm competing with LinkedIn, Netflix, and Apple" and then am stuck with them implementing engines for fun and then I don't have the time to undo it months later - all left me wanting to flee.

Basically, left it for non-technical reasons, just practical "literally nobody except billion dollar companies use this, I've painted myself into a corner" reasons.

But I do have fond memories of building things with it, personally.

Same here. Loved the LTS thinking and Ember data being built in but hiring was a pain and ecosystem packages were often out of date.

Kudos for sticking it out. But man EmberJS is basically CakePHP at this point. A relic of days gone by. May as well use Marionette or Backbonejs.