When I was unemployed, I saw an advert for the job that I now have, in the public sector. It asked for the dates of every job I had ever had. I thought 'fuck that, I'll never remember the dates from 30 years ago temping for companies that no longer exist, and maybe not even the all the companies', and didn't apply.
I was sent to a job coach. She showed me the same job. I explained my problem, which she pooh-poohed by saying, 'All they care about is the last five years, and that you weren't in prison.'
I don't know if that's true, but I didn't submit anything older than my last three jobs, which covered some 16 years, plus my period of unemployment. I got the job, and was never asked about anything else. Obviously, this may not apply to all positions.