I am buying my first iMac and I want to buy a very high iMac.

I dont think I will play games, but I am a drone photographer and my current decent drone already has 4k videos. I don't know how soon 8k is going to become a common thing.
I plan to have the iMac for several years, at least 8-10 years, so I don't want the iMac to be outdated soon.

So the top end iMac comes with Radeon Pro 580X with 8GB GDDR5 memory
There is an upgrade to Radeon Pro Vega 48 with 8GB HBM2 memory for $450

I've never heard of HBM2.
How much better is the latter than the former? Is the former one going to suffice my needs 6-8 years down the line?

Any insight is appreciated
"Dont buy" posts are not welcome

stick to 1 thread

I didnt know which was the right place to post