What do you think about the Kreg jigs? I have seen them, and my sweetie spotted them in the Lee Valley Catalog she was looking through.
I started thinking more about your question last night, watched Kreg's video and actually read (rather then skimmed) their instructions https://www.kregtool.com/webres/File...Jig-Manual.pdf
Without having a cabinet to install drawers to look at, the one thing that seemed to jump out at me was how to install multiple shallow drawers, especially if the drawer was close to or narrower than the width of the support - I've got a cabinet that I'm getting ready to start assembly, no drawers but that doesn't matter, and I'll try a dry run through installing a run of drawers in the cabinet to see how that would work.
If you look at their "Operating Instructions" (above), the method they describe for installing the bottom drawer is how I do mine, with the spacer strip lying on the floor and sticking out of the cabinet. Once the bottom drawer is installed, I use a strip on top of the drawer side to space up the next slide (Maybe it's just me, but I like the slide kind of centered on the drawer). Once the cabinet slide is installed, a second strip that gives the spacing between the drawers is used to locate the drawer, the lower drawer used to support the upper out of the cabinet while the drawer slide is being attached - this is the strip shown in the fourth photo of my posting.
I can see how the jig would work well for cabinets with face frames, and maybe OK for a frameless cabinet where the drawers are spaced further apart than the depth of the support, but I'd have to look a little closer if the drawers were shallower because the slide would maybe interfere with the location of the support for the drawer above it.
Hope that this helps.