Our Current application that we are using is still on Pega 6.1 SP2 version and will need to use the application for few more years.
Could you provide an update on the following: What would be the level of support that we are going to get if we keep the same existing environment as-is for at least 5 years? Which version of Pega 7 would be feasible for us to upgrade with minimal effort?
Pega 6.1 Sp2 version is still supported. If you are not upgrading then soon you are going to face a challenge with the underlying infrastructure like Java, Application Server and Browsers etc will not supported.
If you are upgrading underling infrastructure not the Pega then Pega 6.1 Sp2 may not work with latest infrastructure like IE11.
You have to upgrade to latest Pega7 version available at that point of time. Current Version is Pega 7.2.2.