What really makes me wonder if an iMac is worth it because the AIO configuration. I current have my 30" ACD for several years and still a workhorse and perfect. I would hate to get rid of this 5K display because the innards of the iMac will be outdate in few years but the display amazing still.
The funny thing is, for the last decade or longer, you're probably right, displays could typically last through at least one computer upgrade. Now, display tech is changing so fast (4K, 5K, 8K displays all coming quickly) and computer performance has really levelled off. I now look forward to a new display more than a new computer.
So I wonder if that display on the iMac may be seriously outclassed by the time the computer portion is tired.