In the meantime, if you are in the Apple world then Goodlinks is a privacy friendly option for saving articles to read later.
I haven't found a decent alternative that can add articles via email like Omnivore. My workaround is to get the RSS link from Substack and add these to my RSS reader that I self host (FreshRSS).
I've heard of this but didn't use it because all of my email newsletters are on substack and substack supports RSS. Also, with substack RSS, you get a feed per newsletter whereas Kill The Newsletter gives you one feed for all newsletters going to their address.
In the meantime, if you are in the Apple world then Goodlinks is a privacy friendly option for saving articles to read later.
I haven't found a decent alternative that can add articles via email like Omnivore. My workaround is to get the RSS link from Substack and add these to my RSS reader that I self host (FreshRSS).