All I am going to say is Yes get another body, that is why I bought the 7D MK11 perfect for Birds and my Birding lens stays on it all the time, so no dust bunnies as yet
I still have my old 5D Mk11 and my even older 40D that I swap around when I want to shoot macro or flowers.. Both would be close to the 150,000 shutter count by now.
Whatever you pick I am sure it will be the right one, remembering now there is a lot more on the cameras today than there were years ago so more to learn and remember.
And it can get confusing at times especially when you want to view the images, I still forget when I shoot with one of my older cameras. The there is the Olympus E-M1 so different again