I’m wondering if I need to take more credit out? Oldest line is ~8 years old. No late payments, I have like 4-5 active cards, paid off a car loan in 2023.

We have a mortgage, and 3 credit cards no debt. Our percentage of credit usage is very low. I think each one of those cards has a $20k limit and rarely ever have $2k on it and mostly have less than $1k monthly. So I don't think you need more. Make sure you're limit to spending is good.