I've written a lot of Rust code that's in production in web, messaging and telephony contexts. I considered using Actix early on, but as soon as I saw the large amount of unsafe code, I stopped considering it at all. I did not go on the Internet and try to convince other people not to use it. I did not complain at the maintainer that he should manage his project differently. I just didn't see why a library doing what…
Doing this well and thoroughly is extremely hard, and commercial enterprises spend a lot of time and money doing so (or pay the equivalent of insurance to not worry about it). Doing a minimal amount of research entails doing what you did. Look at the current and past state of the item in question, and decide whether it's worth putting the significant amount of time and effort into using it.
I can't help but feel the vast majority of people complaining failed to do this minimal amount of legwork. They're upset about their lack of forethought for what they view as a bad investment, but that's on them. Unfortunately, I find people often have a hard time accepting blame onto themselves, but feel there is blame to be assigned, and so it needs to be directed somewhere.
They say don't look a gift horse in the mouth, but if you are responsible for dealing with whatever diseases that horse might introduce to your stable, or even if you are just legally obligated to deal with the care and feeding or removal on death of such a large animal, you definitely look that horse in the mouth for red flags.