Yes - we need some redundancy. Don’t abandon the other platforms, but also replicate efforts elsewhere.
Could also post to Vimeo and DailyMotion as well for videos even though they are lesser known just to make sure there is additional redundancy.
Also Steemit is the bitcoin of social media.
As bitcoin doesn't need a bank to validate currency transactions steemit doesn't need a zuckerberg to censor posts.
Both are based on blockchain technology:
steemit is amazing tech.
ditto for dtube