I think 95% is not archieveable - independent from soft or hardfork or what about the change would be. I think we are already too big and diversified for this. imagine a society where you have a government which is only able to work if more than 95% of the citizen voted for it (in freedom). Sounds not possible anymore.
I would suggest over 95% support is achievable for a consensus critical bug like we saw in 2013. This solution may make it far easier to activate a SF , but yes supermajority HFs are still extremely difficult. I also believe that we should try and get segwit activated as it might be the last SF we see as bitcoin begins to ossify.