It's ok if you're 16 :P

Mattresses should be replaced much more frequently than most people change them... Heck, we'll spend 30k on a car every 5 years to spend 2h a day in it, but we won't spend 1k on a good mattress every 10 years even though we spend 8h+ a day on it... Crazy right?

Don't even need to spend a fortune really, Ikea has fairly good cheap mattresses 🤷