@todor
OPML is a way of importing and exporting your feeds twixt spaces - if it would synch - I could forget about it.
I use Feedbin as a back end to my NetNewsWire - AND I am a Readwise user - My Feedbin has been 'curated over years - and in all honesty there is a lot in there that I don’t read - cos they don’t relate to 'current me' - but one day they might again ... so I keep the feeds in place - but ignore.
SO - when it comes to Readwise - I don’t want to block move everything over - I am trying to use Readwise as more of a home of 'considered thought' - rather than a bucket.
This means - I have on and off tried to import 'important' feeds there - and not others - that I just vaguely track - read maybe with time and maybe even totally ignore. It works nicely - for my 'top 20'
I had forgotten that I had Feedbin connected to MicroBlog - but that still isnt synch?
BUT - you had me at folder support into Readwise.
My NETNEWSWIRE OPML export moved the folders over and I can then use as I see fit - BUT - under Readwise - my folders were just ignored. So, looking in Feedbin - I see the folders - so maybe next job is to export out of Feedbin and see if Readwise accepts those folders.
That would help for sure.
As someone we know in this world says ... "still diggin'