well, it would be interesting to run a comparison with current blender and other DCC. But yeah, handling complex scenes isn’t blender’s strong point yet…
however in the meantime it’s very easy to bring any DCC to it’s knees if you don’t know what you’re doing. Filling the ram, having too many objects, or too many poligons, too many calculations it’s not that difficult to do…
If you know what you’re doing you can bring a lot of details in blender, you can look at all the commercial projects done with it , this is also a good example with many tips that shows how to do more with less as the author said :