Even if your DIY woodworking projects are limited to the area of your yard, it will be quite difficult to work with a corded miter saw. Don’t forget that it’s a heavy type of tool, and cable management only adds cumbersomeness to the construction.
Modern Li-Ion batteries can hold the charge long enough to let you cut batches of lumber for decking, roofs, sheds, and other structures of almost any size, so there’s no need to hold yourself in the past just to save up a few bucks. By the way, not all cordless miter saws today are more expensive than corded ones, so you really have to think about it.