Bitcoin needs to do an Uber and scoop up as many users as fast as possible round the world before gvts, regulators, and banks can stop it. we may already be there fortunately but we do have a ways to go and it's clear that 1MB is an artificial cap on growth.
That's the biggest concern I have.
Bank-based Bitcoin competitors are not stopping to take a break and study issues - they are actively working to hire developers and build systems that can grow faster than Bitcoin.
Meanwhile, the anti-scaling crowd is telling us we need more time to study the scaling issues even though they've been saying that since the first time this issue came up in 2012.
Apparently they are the only developers capable of making any change at all.
Wait they're not? So what exactly is stopping some developers from coding the fork and releasing it? Are people worried miners will attack and destroy it? That attack can't succeed in the long term. If the attack works once, you just fork again with a 1 line change to move the fork point forward. Miners are not going to keep wasting resources on that forever, once they see your fork isn't going away, they may see it as more profitable to mine on it honestly.
I'd run it, and I'd probably sell at least part of my stake in the 1mb fork.