But I see a few scenarios.
You have a strong network and the resume is a formality. In that case it’s easy enough to tailor your resume for the job. I don’t need to put that I wrote FORTRAN and C on VAX and Stratus mainframes in the mid 90s. There is no need for an 8 page resume. The year before last I had two offers for strategic positions based on my network.
The second case you are targeting a company where you know you have a competitive advantage, again in that case, you only need to have a resume that focuses on what gives you a competitive advantage. In my case, now I focus on strategic cloud consulting positions that focus on app development. In that case, I only need to focus on my job at a startup in 2018, talk in broad strokes about my time at AWS (working there automatically gets call backs by the way), and when the day comes, when I leave my current job as a “staff architect”.
The worse case is if you are spamming your resume far and wide and you are looking for any generic job. I look at an 8 page resume and then I have to take the time to see what is this person trying to communicate - it goes in the trash and I move on. I have hundreds of other resumes that I can get through quickly.
Of course if the company is reaching out to me, it’s even easier to tailor my resume for the job requirements. I have my “career document” to pull from either way that is as long as needed.
But even then I’m not going back even to the low level work I did in 2012 for Windows CE devices.