hardware and software are extremely mature

And that’s a good thing, perhaps except for tinkering purposes. I have to rely on my phone for several things throughout the day, sometimes more than I’d like to, so the last thing I need is bugs introduced just for the sake of changing things.

If you buy from a reputable seller with a good free return policy, at worst you’ll have to send the device back. If you have access to a credit card or PayPal, it’s a good idea to use them, in case the seller becomes unresponsive.

Your entry for Omnivore says the link to the hosted version is broken. That’s because it shut down at the end of last year.

It was a good option for read-it-later, whereas most of the of the bookmarking self-hosted apps seems more focused on saving and sorting links.

Is it good for read-it-later functionality, for example to read from a phone without online connectivity?

I don’t like it because it has become very iPhone-like in the bad ways, meaning it takes several clicks to do simple, common tasks. I much prefer Samsung’s OneUI for how easily accessible everything is.