If your computer is compromised to the point someone can read the key, read words 2-5 again.

This is FUD. Even if Signal encrypted the local data, at the point someone can run a process on your system, there’s nothing to stop the attacker from adding a modified version of the Signal app, updating your path, shortcuts, etc to point to the malicious version, and waiting for you to supply the pin/password. They can siphon the data off then.

Anyone with actual need for concern should probably only be using their phone anyway, because it cuts your attack surface by half (more than half if you have multiple computers), and you can expect to be in possession/control of your phone at all times, vs a computer that is often left unattended.

it doesn’t unravel the underlying complexity of what it does… these alternative syntaxes tend to make some easy cases easy, but they have no idea what to do with more complicated cases

This can be said of any higher-level language, or API. There is always a cost to abstraction. Binary -> Assembly -> C -> Python. As you go up that chain, many things get easier, but some things become impossible. You always have the option to drop down, though, and these regex tools are no different. Software development, sysops, devops, etc are full of compromises like this.

I had to use vi for work (only editor installed on the servers), and it snowballed and now I can barely type in anything that doesn’t have vim bindings.

The first few days were pretty rough, but I learned the absolute minimal basics, and then just organically learned features as I needed them/whenever I felt like what I was doing was tedious, and there had to be a better way. It’s been about 10 years, and I’m still learning!

One small suggestion, check YouTube for videos of people showing off vim features, e.g. https://youtu.be/5r6yzFEXajQ. You won’t remember everything from one watch, but it’ll help you see what is possible/how powerful vim is, which can guide your “this is so painful how do I make this better” searches down the line.