At this point in my life if someone I actually know irl calls out of the blue, it induces anxiety as it's a very non-zero chance someone has died...
100% this. Apart from my SO and scammers, no one randomly calls me. If my brother would call me out of the blue I'd assume the worst. (Also, the one random call I vividly remember getting the past years is my mom calling me to let me know my grandfather unexpectedly passed away).
It's just needlessly anxiety-inducing. Not to mention it's a major inconvenience to interrupt someone randomly for a chat.
Man, this is the opposite for me. I'm filled with a great sense of relief any time my phone rings and I recognize the number...
That’s the reason I started reaching out to old friends. A friend had died and I knew no one else would tell them. One I even had to track down through email and ask for their new phone number. But now that I’m in regular contact I find calling easier and I don’t have worst-case-scenario fears anymore.
Yeah, that's one of the reasons calls out of the blue are mostly reserved for emergencies in my family and friend group. Texts eliminate that factor, and are more polite. A phone call represents immediacy / urgency ("this merits interrupting whatever you might be doing right now"). A text like "hey are you free for a quick call?" lets the recipient pivot from what they're doing and engage on their terms. IMHO it's more considerate.