I also have a Remarkable 2 and a Boox Note Air that are obviously much more hackable.
I’ve reviewed many Kobo devices over the years. I do find them second-rate compared to what you can get from the Kindle line. That's my honest opinion. That isn’t me feeling insecure about my decision (I am an e-reader enthusiast and have reviewed dozens of devices and have the money to buy whatever device I want. I think Sony made the best devices if I’m really being honest, and they shut down their storefront over a decade ago and barely sell any units now), it’s my personal opinion and I said “I’ve always seen it as” — I didn’t declare that as fact. You disagree, which is fine!
I’m glad we have a choice of things. I still stand by my opinion that if I’m going to be tied down into an ecosystem, I’d rather be tied down to the one with the most books. And where I live, that’s Amazon.
I don't have to say, imply, of even think that Amazon is "second-rate" to make myself feel secure about my decision. If anything I had to choose any word, it would be "monopolistic" or "vendor lock-in". But don't get me wrong: if Kobo changed their practices such that those words did apply, I would happily move elsewhere. (Kindle and Kobo are by no means the only companies out there.)