The (IMHO) important bits:

TLDR:

Our continuous internal reviews and beta test groups have highlighted areas that we need to focus on more, mainly performance and content

From the FAQ:

Is the game canceled?
No, the game is not canceled.

What happens to pre-orders?
All pre-orders will be refunded in the upcoming weeks. The option to pre-order the game will be removed and the bonus will instead be added to the base game for all

Is there going to be Early Access or Beta Access to the game?
There will not be an early access or extra beta access right now

In the blog there are the steps to how to get the refunds, I’m not copying them in case they change.

As they say, A Delayed Game Is Eventually Good, But a Bad Game Is Bad Forever ^/s?

Are you actually downloading all the stuff from GoG locally?

To be fair, I do not, but I could if I wanted to, and that makes all the difference.

I only keep a copy of the games I enjoyed and I think I will replay and the ones that I plan to play, so - even if for any reason I don’t have access to the net or the service is down - I still can install them.
Someone could say that I could just install them directly, but I put them in a separate, slower, external HDD as installers and occupy my internal drives’ space only when needed.

The only reason I don’t backup them all is that I don’t see, personally, the point in having thousands of installers and tens of TiB of games I know I will not use ever again. But someone could just want to keep them all because they like archiving, or because they are into video game preservation efforts.
And again having the freedom to do so, the choice to do so, is all that really matters.

If GoG would go under suddenly, I don’t think a lot of people will have their library backed up

I would have the ones I cared about, and I’m pretty sure the whole of GoG’s library would suddenly appear in the net, easily accessible, for everyone. Again.
And I would not feel the least moral sting if someone was to retrieve from it a copy of what they’ve already paid, without the need to circumventing protections or modifying software that could be seen, in some jurisdictions, as illegal and without the risks connected to malware disguised as cracks, or the possibility of bugs involuntary introduced by the legit ones.

Point being that it is true that most people will not use the full extent of their freedom, because they don’t care of it or are not interested in it, but having that freedom is the point in itself.

This is one of the reasons I stopped buying games from steam or the various DRM enabled/account locked stores.

Now I just buy from gog, at least I can have a local backup of all the installers even if they stop providing them for a reason or another. Having to wait or miss out on some games have really lost all meaning.

If they don’t want my money I’ll just use them for something more useful.

EDIT: After re reading this comment it felt like I was astroturfing for the company, but I’ve no affiliation with them, I just like the fact of owning what I buy. I know about the difference of licensing and real owning, but I feel that if I can just use an installer whenever I want it’s a lot closer to owning it.

Let’s be clear, it’s really low risk, especially for such a low strength one, but some types of components can get damaged by it, or you could end up dislodging badly soldered or already damaged ones while you move the board around.

In the worst case, if you dislodge them just enough to give you an intermittent problem, good luck debugging it.

I just feel that it’s not worth risking it.

Please don’t put the electronics directly on the magnetic mat.