I have a plain open top/no drawer Snap-on tool cart that I have had for over 20 years now and is probably hands down one of the most used tools in my shop. It gets used for nearly every job in my shop.
I will generally load up the tool cart with tools that I may need at the toolbox before moving it into place at or under the vehicle. Then more tools accumulate throughout the job as I need.
Also works well for holding my brake bleeding pump/container and I can easily move around the vehicle.
Tools at easy reaching height when working under a vehicle on the lift. Also convenient when you have your hands full to be able to put parts, fasteners or tools into the cart from a standing position.
When the project moves from the vehicle to the workbench it can be easily rolled over to support the work at the bench.
Or at the fabrication table.
Many of my sockets are in magnetic trays so as I am loading the cart to work on a specific task I will grab the socket tray(s) I think I may need. Then smaller tools I keep in magnetic trays on the sides of the cart so I don't have to dig for them in the open top cart.
When the job is completed, cart is rolled over to the main toolbox where tools are cleaned before going back in to the toolbox.
This is what works for me as I prefer the open top cart for many reasons over a drawer style roll cart full of tools.