We have been developing a product in Visual Studio 2012 for a while now. Yesterday we decided to task one of my colleagues, a junior person who has shown a lot of potential, with some work to get him into the development space where, I think, he can make a real contribution over time. Anyway, that aside. We went looking for VS2012 and couldn't find it anywhere in our MSDN subscription, only a VS2012 Update 5, but the update is no use without the original install source.
Of course we have access to VS2015, and in normal circumstances I am usually quite keen to stay current. But I have had a VERY bad experience with our last upgrade from VS2010 to VS2012. We had created Setup projects using the InstallShield software that came with VS2010, only to find that this product had been pulled from VS2012 and we had to scramble to find alternative solutions to the problem. It was unnecessary additional work.
So I'm reluctant to move to VS2015. What nasty surprises will we be presented with then? What can you, experts, tell me to either allay my fears or warn me off making this move?