There is no concrete opinion, however my last position I was dragged into interviews over the years as a lead for various roles under me and in support of my team. After getting dumped 30 resumes by an HR rep on a weekly basis, I personally only cared about the first page. If you wrote a book but the meat of your job experience was on page 5 for the role you were applying for, I passed you up. If I didn't see any relevant experience in your previous two jobs or within several years back I moved on etc.

I wasn't trying to be difficult, though just when you have a stack of 30 resumes to get through, on top of your own work there is never enough time. I learned too many on other teams at my last two jobs operate in a similar fashion. This isn't universal, there are some companies that actually want a book or two on your life, but it varies.

From my own experience I keep my resume simple, I have a brief executive BLUF at the top, a side bar for my various education degrees, certifications, technology proficiencies etc, and the main meat on the rest of the page. Even with 10 years experience, I've been able to keep it to one page. It forces me to only keep high level items I would want to cover in an interview. YMMV though.

Again no right answer here as its very company and team dependent. I just know I have the attention span of a goldfish in this area and know I am not alone.