Only some functions on the old Wave got Locks.
I am always interested in learning and to listen for what are the most used or useful tools.
Many experienced knife people mentions a multi-tool
or a Swiss Army Knife style knife. The large plier, scissors and screwdrivers are among the most used functions besides the knife blades. A fixed blade and a multi-tool are used by many.
Leatherman multi-tools with one hand opening functions and locks are very popular and I agree they are nice tools because they save time and the versatility/safety increase. The combination of knives and tools are one of my interests and the first time
I had a Leatherman in my hand it just confirmed this 100% many years ago.
I can only see positive reasons for using a fixed blade and a multi-tool and or a Swiss Army Knife.