It's not about being asked for an email.
It's about being lied to.
You wouldn't be OK with the New York Times writing that Putin died of a heart attack when it's not true. Why would you be OK with this kind of deception then?
If I click on your link, I took a leap of faith on you. If I then find out that you lied to me, you made my day worse and innocent bystanders like the next guy who actually did have a free ebook will get take the damage.
He could have truthfully said: Show HN: Ebook here but you'll have to enter an email address. Then I wouldn't have clicked and we wouldn't be having this discussion now. I suspect the link wouldn't have been upvoted enough to appear on the front page either.
Also note that if I use a burner account from some spam catching service, I'm externalising my damage on to them. They might be OK with that but it's still shitty behavior on my part. So I don't use throwaway accounts. It's a moral thing. You don't litter in the park. You leave it cleaner than how you found it.
Maybe it's me but I wasn't shown a free ebook. I was shown a "give me you PII so I can spam you" trap website.
If you ask me to give you my PII then it's not free, is it?
Are you not aware how many "free ebook" spams are being sent around, usually from disreputable SEO people begging you to link them from your site? The fact that you registered your own domain is another deep red flag. Clearly there are ulterior motives here aside from "I want to help the world by putting our a free ebook".
People complaining about how user-unfriendly SAP is or how companies adapt to SAP instead of the other way around are missing the point of SAP.
The point of SAP is that the module for your type of business is being implemented at the market leader in your area, because they are the only ones who can afford it. SAP will come to the market leader and put their processes into software.
Then everybody else adapts to SAP not because adapting SAP is impossible but because SAP implements the processes that made the market leader successful (at least that's the idea).
So it is very intentional that you adapt to SAP and not the other way around. You do it to emulate the market leader.
And the user friendliness is also on purpose. If you go visit a company using SAP, you will find that you have a certain job in the company and it needs two or three things from SAP. Jobs are very specialized, so SAP is, too. Nobody is supposed to just wing it with SAP. You are supposed to learn how to do your transaction with SAP, and that transaction is then meant to be super efficient.
If you actually go visit a somebody from an enterprise environment interact with SAP, you will be astounded how quickly they can do what they are supposed to do. It's almost as if the software was optimized for frictionless efficiency.
Also note that user friendliness is a subjective and mysterious area. If you go look at an airplane cockpit, where actual research was done into how to optimize user interfaces so that the pilot will not be confused under stress, you will see that there is a separate button for everything. There is no "shift key", no different modes. If you need to use it, there is a button for it. To someone who has not learned how to use that UI, it appears alien and unfriendly. But the the trained pilot it is the pinnacle of perfection.
I do care about video playback battery performance.
So much so, in fact, that I bought my current laptop specifically so it would last long when watching videos.
Also note that tablets, smartphones, the Macbook Air and the Surface are sold on their battery stamina, and specifically while watching videos. And how would you measure that? Youtube, of course!
Why would you even post this here? Who do you think this is helping?