Corvette-sized OPVs and the risk of replacing frigates

Should the Royal Navy and other NATO navies follow Italy by building corvette-sized OPVs with some modular capability?

The idea is welcomed, with a concern that such ships would be used to justify ending frigate construction.

A corvette-sized offshore patrol vessel with modular capability is an attractive proposal here. The concern arises when its existence influences later procurement decisions. Such ships could become a reason to stop building frigates, allowing the patrol requirement to displace the wider fleet requirement.