No. But they’re really inexpensive and link up to people’s Amazon accounts so it’s easy to manage your books, if you are a person who likes to use Amazon for that.
I’ve had two Kindles, the first was before they had touch screens, and I loved it (this was a long, long time ago). Even with the hard case eventually I broke the screen after many years of travel and use, and hated the one I replaced it with. Awful piece of garbage, I wanted to return it and get one with physical buttons but they didn’t make them any more and I was too lazy to do second hand searching. I’ve never used Amazon to buy e books but I got a lot of free ones over the years (mostly cookbooks) and it was handy to be able to just download them directly to the device, but I prefer to manage books over USB and that always worked fine.
E-ink is amazing. Battery life lasts for ages, which really is what you want for a dedicated reader. There’s other types on the market, but it’s hard to compete with Amazon’s prices and feature set - especially because they sell ones that are ad-supported and that REALLY drives the prices down for people that are willing to have their lock screen be an ad that goes away when they wake the device, which is an easy compromise for most.
My Kindle just collected dust now, I use a supernote as a note taker and I use it for ebooks also. It was about $500 USD - granted it does way, way more than a Kindle, but yeah. I could probably get an ad-supported Kindle for 1/10 the cost, maybe, not sure what their prices are these days. Not saying that competing dedicated readers are in that price range, they’re not, but Kindle dominates the market due to brand recognition, advertising, and as far as I know they were the first to really offer a product like it in the first place so they’ll always have a big piece of the market, like iPods did in the MP3 player space vs objectively superior competitors that came after it.
It’s more about having fewer devices on Wi-Fi network IMO.
Until Wi-Fi 5, only one device could talk on Wi-Fi at a time, and even with 5+ the number of devices is limited by a ton of factors, so the more devices you have chattering the slower everything gets as devices wait their turn to speak, have collisions, time out, try to speak again, etc.
You can mitigate this through several different methods, but removing randomly transmitting devices will always be a benefit.
Zwave, zigby, all of those all operate in a different band so it’s better for your internet connection to wireless devices if you can offload stuff into those ranges.