Eureka.
In the last 6 months I've only gotten 5 spam or scam calls or texts total. It used to be 5+ per day.
I can't tell if one specific change I made did it, or the combination.
Was it changing to #Linux ?
Was it #Fairphone with #Murena ?
Was it ditching my old cell carrier and moving my number to #XMPP ?
Was it bailing out of gmail or outlook for #opensource email options?
Was it abandoning corporate social media and replacing it fully with #Fediverse ?
Whatever it was, the silence and ability to use my phone for its intended purpose - talking to people I know - is glorious.