I settled on Raindrop.io which is free but I paid to support it ($30 a year I think). I had to change my workflow slightly and the Obsidian integration is not as great as Omnivore's, but it wasn't a pain. The browser integration is really good and I prefer it to Omnivore's. It supports RSS and has a decent mobile app.
Overall I think it's a decent replacement and I'm happy.
I tried Wallabag but the Obsidian integration was poor and Wallabag felt unloved recycle by extension made me question it's future (which is unfair given my limited time with it). There was a trial which was not enough time for me to evaluate it comfortably.
If you're looking for something like this, but not paid for, try Debian stable. Same idea but free. Ubuntu also have an LTS version and I'm sure others.
The "Enterprise" in the title just means "support", which is a check box for a lot of organisations. Not so much home users.