Joplin alternative for exporting highlights?

I have a Joplin Cloud account and after reading the KOReader wiki on setting up Highlight exports via Joplin. It sounded like A LOT of hassle, so I came here to search for help on how to do it. In the process I came across mention that Joplin is usboptimal for purpose and suppor for it will be removed from KOReader anyway.

SO, what is the simplest alternative? As I'm paying for Joplin, I would rather not pay for a service that I would only use for exporting KOReader highlights