When I'm writing my resume, I generally chop off all but the last 10 or so years of my career, and then chop off anything else that gets me down to one page. When I'm reading them, I simply toss all but the first page into the trash. Nobody reads past the first page anyway. If you can't fit your resume onto one page, that's a communication red flag--you're not skilled at summarizing. It indicates you may have trouble doing senior-y things like presenting to execs and discussing your work cross-functionally, both of which require the ability to distill the main points from the details.