I own two of these bodies including my original one which is still going strong. A workhorse of a camera and I still love the colours and files from it.
At 21mp it can still hang for professional work today and they are cheep as chips on the used market.
The usb port is a weak point and if care is not taken can result in a £400 repair bill. Whoops.
I use one for BTS, 2nd video angle and timelapse and the main one get used for head shot jobs. Nobody needs a 50mp head shot so 21 is plenty. The sensor in this whilst not the best performing by todays’ standards has something special about it.
If I had to start again today I would buy two 5D Mark II bodies and get to work.