The problem is that these "other implementations" only have half-baked, horribly coded improvements.
Interesting assertion. I'd like to read your extensive code review of each such "other implementation".
There isn't an extensive code review of such an implementation by myself (probably not by anyone, as I haven't seen one).
Well, at least you admit when you are caught making shit up on order to influence a debate. Does that make you honest? No - it makes you a liar that has been caught in a lie.
Well, no. Segwit does absolutely nothing to make larger blocks safe.
Yes, it does actually, since there's no such thing as "The SegWit Omnibus Changeset".
Sure there is. You may not recognize it under that name. Hell, you may not recognize it at all. But there is certainly a difference between the feature 'Segregated Witness', and the bundled code release that includes several other features as well.
Oh -
https://bitcointalk.org/index.php?topic=1530463.msg15417685#msg15417685