I may very well change my mind but here's my thought process so far:
I will do the 2020 iMac i9, buy an interim z620 or similar machine to run a few VMs in combo with those on my iMac and then spend time researching and spec-ing out a Threadripper 24 or 32 core build. Did my preference for a single machine now potentially expand to 3? Yes, but these items can all be contained in a limited space easily. I don't want to be cluttered with PC parts and old machines. As long as my workspace and dwelling is clean and not overly cluttered, that is fine. Ideally, I want to spec out a high end PC that will last a decade with minimal upgrades with consistent performance year over year. But that topic is starting to get out of scope of these forums.
I will do the 2020 iMac i9, buy an interim z620 or similar machine to run a few VMs in combo with those on my iMac and then spend time researching and spec-ing out a Threadripper 24 or 32 core build. Did my preference for a single machine now potentially expand to 3? Yes, but these items can all be contained in a limited space easily. I don't want to be cluttered with PC parts and old machines. As long as my workspace and dwelling is clean and not overly cluttered, that is fine. Ideally, I want to spec out a high end PC that will last a decade with minimal upgrades with consistent performance year over year. But that topic is starting to get out of scope of these forums.