I don't use it myself, but there's a federated blogging service called WriteFreely that markets itself as being very minimalist and simple.
You can self-host an instance of it, just like you can with /kbin, or you can use an instance that already exists (I think it's a few bucks a month if you don't want to post anonymously).
Not sure if federation is something that's important to you but I thought I'd throw it out there.
Nah. The battery on my old Samsung Galaxy S4 literally just pops out with minor force applied as soon as the cover is off, leaving the phone ready for a new one to be slotted in. That is what "user replaceable" means.
Don't get me wrong, I am familiar with electronics, have a diploma in electrical engineering, have soldered hundreds/thousands of components, etc. and I could do this easily (though I have concerns about heating the battery). But most people cannot currently replace the battery without significant headaches.