Depends on the mod. Most single-player mods will function just fine on 1.165 without any need for changes.
For MP mods, I guess it would be useful to investigate why Taleworlds decided to deprecate their operation to calculate player's equipment price and replace it with a script.
For MP mods, I guess it would be useful to investigate why Taleworlds decided to deprecate their operation to calculate player's equipment price and replace it with a script.