Hi scrambler,
Unfortunately … the “mainstream” industry is very different from what it was 17 years ago (you can see a few comments about this here and here) and mattresses that last this long are certainly not the norm where most people end up buying their mattress.
There are still great choices available though if you focus on the smaller manufacturers and retailers that are more concerned about their long term reputation and the quality and value of their mattresses than on marketing stories and the built in obsolescence that is so common in the mainstream today.
I’m glad you found us and I’m looking forward to hearing about your “mattress shopping journey”.
Phoenix