I am not on the tech side but I have responsibility for our Tableau community on the user side? Can others provide some basics of how to know when it is time to add to core? We currently have an 8 core server that has performed well over the last three plus years. We are ready to expand our consumer group to our sales team which includes another 2,000 potential users. Thanks all!
I would start with these questions:
8 Cores says you can have up to 100 concurrent users.
Depending on the number of concurrent users...and if you are heavily building TDE you may have to adjust your architecture.