I am aware of dash it's recent (evolution) roadmap update, and it's plan to do on-chain scaling and I am all for that, but there are also technics such as thin-blocks, that seem to have no down-side for on-chain scaling.
There are multiple good idea's/technics that add benifits to a crypto that wishes to have a fully transparent blockchain. Yet I never really hear the dash team say, anything about it, I would have expected to hear things like: "We know that thin blocks work great for bitcoin, and because they here are only upsides we will implement it, or something like that". It sometimes seems to me like the DASH core team is only busy with there own vision, and do not take the input of other great idea's even do they are available in open-source code. I know the dash team is very busy and is keeping the white-paper of dash evolution internal for the time being.
My question is simple is DASH keeping it's ear to the ground, and picking up these low-hangfruits, or do they (currently) have their blinders on focusing on evolution?
The most important thing is that you loose the ability to easily prove and authenticate electronic contracts and transactions. In fact there is no alternative at the moment and undoubtedly, any solution would be clunkier and take up more space, or possibly impossible to do reliably with segwit.
With segwit, people could save the segregated witness "chain" of signatures, but very few would, making the authenticity of the information vulnerable. Why would very few do this? Because the data costs money to store, and nobody is paid to do this. Even if a lot of people happily do this today (doubtful - probably only a fraction of current full nodes will. Full nodes are at the same time shrinking due to the cost of running full nodes) These few nodes will be vulnerable to attack.
Bitcoin Core is hamstringing themselves for a quick buck (they hoped and now can't back out) by centralizing with Lightening Network and SegWit. It may "work", that is, not be attackable on the main blockchain, as it is now, but it will not "work" in smart contracts and other legal needs of people/businesses (nothing to do with the NSA/governments)
http://www.coindesk.com/the-risks-of-bitcoins-segregated-witness-problems-under-us-contract-law/