I would imagine that this may have been answered before, but searching the various threads, they are quite long, and I can not see a definitive answer.
So, if I upgrade to 2021 using my Maintenance and Support for my Classic License, which I have just received from my Reseller, I know I can download 2021 and activate it using my new 2021 Classic License. This would then mean I have 2020 and 2021 on my PC and Laptop, both under a Classic License.
The question is, what then happen if I change to Subscription, which my Reseller is offering at a discount?
Would this new Licensing over-ride the newly activated 2021 License used from my M & S?
This will not be done yet as I want to wait for 2021 to settle down, and the bugs to be eliminated.