Can I use a Pragma 4 (runtime or programmable) dongel for Pragma 5?
Absolutely. There is no problem using a Pragma 4 dongel for Pragma 5. And this will not change in the future, unless some horrible technical problem will prevent us to read a dongel in Pragma 5. By the way, you can even use Pragma 4 dongels for Pragma 3, as long as you use version 3.73 or greater of Pragma 3.