I have a master app built using 2.15 version and mounted with many other ember engines from separate repo with ember cli (v2.15) and engines(0.5.20). Now i want to create a new engine using latest version and cli 3.x. Will that work on the master app 2.15 on mount?
Since an engine is just an addon and the host app build is what builds the engines my guess is that this would not work if the addon (in this case the engine) was using anything not backwards compatible to 2.15. I think it would work better if the host app were updated even if the other engines were not. That said I’m not very sure on this, you could try asking in the Ember Discord ember-engines channel as well.