[seanwilson]

Not completely on topic but...what would happen if one of these new features came out and somebody found a security flaw in it? For example a buffer overflow that you could use to crash miners? If all the clients are running the same client software and crashing them all can have serious financial implications I can't help but feel it's only a matter of time unless I'm missing something about how miners work.

[Zarath]

This is why it's important that it's well tested. Segwit is activated on multiple coins already and is being tested in the real world as we speak.

Alternative options such as EC (which uses Xthin blocks) have already proven to have multiple vulnerabilities and there are many instances of large scale crashing of nodes. Of course the miners that are signaling for this option aren't actually using the software (it's not at all stable, they don't actually want EC and are just using it to stall for higher fees) so they were not affected by the crash, if they were 40% of the hashpower would have gone offline which is a pretty big deal.