Future Car Savings: Taxable Brokerage vs. Sinking Fund?

Hey everyone,

I recently bought a new-to-me 2021 Toyota Tacoma and paid cash. I plan to keep it at least 7 years, ideally 10+ years.

I think I know the Money Guy answer, but I wanted to get some outside perspective: for a future vehicle replacement, would it be better to save in a taxable brokerage account versus a dedicated sinking fund?

For context, I already have a separate sinking fund specifically for maintenance and repairs.

Thanks in advance for the input.