since my agency model for quick and robust website design is depending on Elementor Pro and since I found no mention of this plugin (except for the “confirmed working…” topic) I contacted their support for an official statement regarding the future of Elementor in ClassicPress. I took the permission to post their response here.
Thanks for contacting us.
As for now, there are no plans to officially support ClassicPress as our plugin is meant to be used on official WordPress and we will have to try and cope up with their changes.
Since elementor free version is opensource a coder can take and modify it to be compatible with ClassicPress.
Thank you for understanding.
Personally I understand that I will have to play the “as long as it supports 4.9.x” game for most plugins.
I keep a local installation of ClassicPress with my main plugins (ACF Pro, Elementor Pro, SeoPress Pro, TranslatePress, Gravity Forms) and keep testing on every update. If the mentioned plugins are behaving ok, business is fine.
I will try to keep this topic updated on Elementor compatibility.