I am looking for an e reader with specific features, honestly I don't know if what I want even exists, but I figured this might be a good place to ask. Here's my wants:

• Charge via USB-C
• Open, allows .epub files (I understand some brands don't)
• interfaces with Calibre
• Does not have any wireless radios ie bluetooth, wifi (I know lots of people would say just turn those features off, but I would just prefer the device doesn't have them to begin with)

Have you guys seen any devices that meet this criteria?

So for various reasons I can't use paper books very well. I've been reading almost exclusively on epaper for... 15 years or so now?

My current reader is a Kobo Aura One which has done very well but is starting to get a bit tired - the screen is a bit scratched up and the battery life is measured in days rather than weeks (at around 1hr/day reading with the frontlight on low). Plus the usb socket has done that annoying thing where the cable needs to be at the exact right angle in order to charge.

So I'm in the market for a new one. I'd like it to be >7 inches, 300ppi (same spec as the Aura One or better). Overdrive support is nice but not essential. EPub support is a must, as is orange/red frontlighting. Linux slightly preferred over Android. Battery life in weeks. Waterproof doesn't matter. Cloud sync, bluetooth, audiobook support, apps (other than a decent reader), note-taking - I don't care about. It's for reading books, nothing else. Budget is not a huge issue but I don't want to spend more than I have to.

I have had zero time for the last few weeks to look into what the market is doing now and it's been many since I paid much attention to the world of ereaders, so anyone who is more up to date than me who can offer some suggestions would be much appreciated.

A while ago there was a post comparing e-books and hard copies. After chatting with a few people, I was convinced to spend the money on a Kindle to replace reading on my laptop.
It's an amazing difference and I'd recommend it to anyone who reads on a "normal" screen. My eyes don't get tired, night reading is more comfortable, I've got 40 books in my pocket, the screen really is glare free, and I've charged it once in a week and a half.
So if you read e-books, get a reader with the e-ink screen. It's worth it, and thanks to those who convinced me.