Have you been using the same VPS for the past decade? Most providers offer upgraded options by now better specs, better performance overall. Personally, I wouldn’t stick with the exact same server for that long. Tech moves too fast for that. You’ll also probably find a much cheaper option that you’re currently paying with the same provider.
The costs of servers a decade ago were skyhigh compared to now.
Downgrading is always a good idea, especially if you’re not close to even hitting the limits.