I think MP1 will live, and be maintained for many years to come, and this is a welcomed change because it may decrease startup time and the code is more manageable.This is nothing against this change from my perspective as a developer. It is a good thing to split the plugins into assemblies (heck you are trying to make MP1 more like MP2 ) - but it is really late in the life cycle, that's where the troubles come from.
Amen. If users want to run old software they are welcomed to do so, but they can't expect the same support anymore. My two cents...For a user who does not use the latest version, there will also be no impact, beyond them not being able to use the latest version of plugins. I would hope that if they are happy with their old version of MP, they will be equally happy with the older versions of plugins.