Geoffy The Workstation

Good build, nice cable management. Only things I would have changed would be a Ryzen 7 processor, 3200mhz for ram would have been fine too.

Comparing processors doesn't work like that though. The threadripper is an entirely different chip, with a different socket and with different requirements.
Apples != Oranges

That is a whole different scenario and not compareable. We're talking 3x to 4x the core count here. That's why AMD does not include coolers with Threatripper.

Even in that situation, the wraith prism is a more than adequate cooler.

It is true that you will lower the temps with an aftermarket cooling solution, but the thermals will have no more than a marginal effect on lifespan. Your CPU will long be outdated before you run into problems that were caused by too much heat, especially since the CPU is not running at throttling temps, which help to protect the CPU from thermal wear.

The stock cooler will be fine. It's more than adequate for daily use. And fair if you want to put a small oc on your chip someday.

If you don't want to overclock, the included cooler will do just fine. That being said, the CPU can indeed get quite toasty even when running at idle, putting out temps around 50°C and up to 70°C when under load according to my own experience with the 3700X. Given the higher clock speeds, the 3800X might run a little hotter, but still nowhere near throttling. 
Also, the cooler can get a bit noisy, which I personally don't really have a problem with at the moment, but I'm still planning to upgrade to an AIO later on. So far though, the Wraith Prism is a good enough cooler for daily use. 

If this was a Threadripper with an air cooler I would definitely say change to AIO, but it’s not, you can’t compare them because of TDP, much higher core count, and different sized die, causing higher heat. Not good to compare them because of these factors and different cooling solutions need for each one.