The difference in terms of raised beds might also be a factor here. Crop rotation plays a more significant role in lower raised garden beds than in elevated garden planters. The reason here is your ability to replace and replenish soil in a garden planter vs just replenishing the soil in a raised garden bed. Soils will contain and harbor diseases year after year as well as lose vigor in providing nutrients to plants that are heavy feeders. Broccoli, for example, is a heavy feeder in a garden and should be rotated in ground gardens and lower raised beds due to the depleted soil. In an elevated planter the soil can be removed and replaced with new soil in that spot where the plant was without disturbing the other vegetation. This is all done while standing up, no bending, and no shoveling. If you happen to notice late blight in any of the tomato or pepper plants merely dig out the entire plant and foliage and place in a sealed plastic bag and throw away. In late fall deeply till the soil to prevent the spores from hibernating over the winter months. In the spring replace or add new soil and compost.
Due to the short growing season here in the Midwest, some crop rotation comes naturally. When potatoes are done they are done! I usually follow potatoes with peas or beans which is what most recommend. I am able to harvest peas and beans till first frost and then replant in the spring again with potatoes. As every gardener knows you eventually become very familiar with YOUR garden and gardening habits. Crop rotation is an important practice in agriculture and should be done to ensure years of healthy vegetation and soil. So if you are at the stage of pulling your summer crops and replanting, consider rotating by all means or just replace and refresh.