I always see drawer systems made out of wood. Wood is heavy, thicker than other possible materials and especially the laminated wood usually used in time it will delaminate if it gets enough moisture on it from spills, ski boots, wetsuits, dog water bowls, etc.
Although from your photos, your work is looking really professional, looking forward to your finished project!
But...
I'd like to see some drawer systems made of other materials like maybe plastic sheet, aluminum, honeycomb panels, or??
I truly understand the cost issue and thus why you're using the materials you are, but my rhetorical question is more pointed towards all the other builders out there, both professional and the garage builder that may have deeper pockets. Although some materials are even cheaper than wood! Take a look below.
Just as an example you can get corrugated plastic sheet, 4mm (0.157") thick x 96" x 60" that have a break test of about 5,000 lbs. Cost? 10 sheet for $58.99.
4mm fluted Corrugated Plastic sheets coroplast 4mm laminated corrugated plastic sheeting, extra strong fluted plastic corrugated sheets, black, white, clear 60 x 96 white, 5' x 8' corrugated plastic sheets - https://corrugatedplastics.net/4mmFlutedCorrugatedPlasticSheets.html
This material would be impervious to almost anything, oil, water, freezing, extreme hot weather, drying out, chipping, etc. And you can't buy anything but the cheapest lumber for that price.
This is just about the perfect material if correctly used! Basically pay attention to the direction of the corrugation when cutting and laying it out.