The problem with that advice is that there will always be a new version around the corner. Buy it whenever you’re ready.
Well, not literally impossible, but it’s slow and very difficult to navigate the page, although there is an “article mode” that easily identifies an article embedded on the page and will show you that without all the other page decorations/ads. The keyboard is like texting, but you have to change modes to enter digits or symbols, and navigate to them on a screen, instead of click buttons, which is really hostile.
I have found that most Kindle books are a couple of dollars cheaper than the discounted hard copy from Amazon. If your objective is to save money, then do not buy a Kindle. Buy it if you want to buy convenience and functionality.
Kindle is monochrome. So I won’t buy any Kindle books where color illustrations are an important part of the book. Even B&W illustrations don’t look great. But I do like the e-ink look.
It’s nice to be able to click on a URL in a book and go directly to the web page.
The number one biggest complaint I have is that you can’t treat Kindle books like real books. You can’t lend them at will*, sell them, or give them away. And being from the paper generation (I’m 54)** I would like to leave my kids some of the books that I really liked, such as books about physics, photography/art books, or classic novels. Can’t do that with a Kindle. Who even knows if the Kindle will be around in 25 years?
*You can lend them, but only up to 14 days, and only if the publisher allows it.
**I am a software developer, very comfortable with technology, and keep everything possible in digital format on my hard drives. I actually hate to deal with paper for relatively transient tasks. However, I have also seen what has happened to digital media over the last few decades. I don’t think there’s machine around that can still read a hard drive from 40 years ago. But there are paper works still around from hundreds or even thousands of years ago.