New Environment or Upgrade current environment

Hi

Our current environment has 3 paths into the environment using connection server tagging, with enterprise licensing

UAG 3.3 (2 per path, 6 total)

Horizon 7.4(1 per path)

vSphere 6.5

Appvolumes 2.13

Windows 7

I've been asked to decide if we should just build out the new environment on the latest versions instead of doing upgrades. I'm leaning this way because I'm thinking of setting up the UAGs with the new ha mode, moving radius from the connection servers to the uag, and adding redundant connection servers for each path to setup load balancing here. I do think when we went from 6.2 to 7.4 it was required to do a new environment, but I'm not sure if its the best option in this case.

I only have about 50-100 active users in general, but I'm wondering how larger installation do approach this, because we are close to looking at more towards 500-1000 users in the next few year.