The author of a library has lost all control over the codebase, and a third party is now making changes to it. That's pretty much the textbook definition of stage one of a supply chain attack.
Considering what Matt has already done, it wouldn't even remotely come as a surprise if a future ACF update would, say, brick all WP installations using ACF on a WP Engine host.
> bank starts fiddling with the numbers in your account
If a bank messes with your money, you ask for your money when that happens. Not defame the bank based that they updated their database, business as usual, but you liked the old one.
how exactly did they mess with your stuff? where's the attack you're speaking about? where's physical harm?
Users will no longer have security updates from the actual makers, and the team that specializes and has built it is not able to touch the code (unless you use theirs)
Injecting code that creates misleading or malicious dashboard warnings is a supply chain attack, even if it’s the intent of the supplier and not a malicious third party interfering with the supply chain.
One of Matt's complaints was that WPE disabled revisions...which JetPack (owned by Automattic) suggests to do in order to improve performance. https://jetpack.com/blog/wordpress-revisions/
I ran servers for an agency with ~1200 WordPress installs on Azure VMs, and I disabled revisions on every one of the sites. How is that different? Did I fiddle too much, despite it being in official documentation on how to do so? Even despite it being actually recommended by Automattic itself for performance improvements? Many of his complaints don't add up. The copyright and WP confusion, I get...but the rest is largely non-sense. Even his Stripe/Woocommerce complaint is largely bunk.
The best outcome is for Matt to step down, Wordpress.org/WP Foundation gets sold to multiple hosting providers (WordPress.com, WPE, 1&1, GoDaddy, etc) and they all commit x amount of money to the project (given it is a very important platform for all of them) and in exchange WPE drops its suit. Unfortunately, I doubt that will happen, because some of this seems very ego driven.
Where's the "attack" part? I thought that was a crucial part in the definition