Earlier quoted context omitted.
What do they use instead?
Standard replacements: For signing: signify/minisign For encryption: age For file transfer: magic wormhole For encrypted messaging: Signal (or your choice of e2e encrypted messaging platform)
How do you trust some key material. The WoT is a complete failure, but modern solutions like WKD are amazing and make PGP just plain work.
The one nice thing about age is the ability to encrypt to a GitHub users key. However, even that is possible with OpenPGP. Here is a tool that I made ~7 years ago that does something similar: https://github.com/georgyo/sshcrypt
Another thing minisign/age don't have is a method to say that a key is compromised.
I don't think the solution to the problems with OpenPGP is too just ignore the problems and switch to using bare keys like new tools are doing.