OK, so what's the safest holdout?
The principle of "spread across multiple platforms" is fundamentally inconsistent with a "safest holdout".
You need to hedge your bets.
You need to realise that free services can be discontinued, paid contracts can be terminated, content or accounts can be flagged, copyright or patent claims may be asserted (more the former than the latter, generally, but expect patent claims on more capable systems), domains may be hijacked or squatted, and self-hosted systems may be DDoSed, require ongoing maintenance, moderation (if user / third-party content is permitted), etc.
POSSE -- Publish on your own site, syndicate elsewhere -- is probable the most robust option overall.
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Notes:
1. A Japanese word, often translated as "unask the question". https://www.awakin.org/read/view.php?tid=583
Big tech companies changed things a lot, and developed very sophisticated infrastructure that we could not compete with.
Nobody could compete with YouTube for awhile. But now, YouTube has made itself so unreliable, that people are forced to find new video hosting services, and people will put up with slower speeds for more reliability.
That's become my mantra about anonymization: that you can't trust any one system/provider, so it's prudent to distribute trust. Basically, what Chaum said, so many years ago.
But that's harder with hosting. Sure, if you lease a domain, you can easily point to different IPs. But then, what happens if you lose the domain?
And for people who don't lease domains, how will your followers find your other sites? Once the one they were hitting is gone, I mean. Some will bookmark all of them, for sure. But not most, I bet. Search services would help, but I suspect that'd be iffy.
