I believe you contradicted your first point by following it with "If Bun starts having more bugs and feeling like worse software"

...so you do use feelings in your calculation? To be clear, I have no problem with that and think there is some level of speculation you need to do when deciding what to rely on.

As a hypothetical, pretend that Bun added obfuscated binary blobs that get executed at build time. Well, your code still works and no effects show up at runtime. Are you going to keep using it or dump it based on the "feeling" that something isn't right?

Bug counts are numbers. Memory usage and performance are numbers. Eventually those numbers get so bad that you leave.