Joplin is not an Evernote replacement. It is an MD note management system which allows users to import EN notes into it. If you are a frequent user of Evernote and clip a lot of complex content from the internet, then you may not want to use Joplin. However, if you are a user who makes simple text based notes with minimal formatting, then Joplin is pretty good.
It’s ability to connect to Nextcloud is not that big a selling point as most users who use Nextcloud tend to have the desktop sync client anyway.
I’m glad to see that you are sharing your enthusiasm about md editors, but this thread is specifically for creating a Rich Text (aka wysiwyg) replacement for evernote.
Can we please stay on topic?