VitaMix
There are two hard to reach cavities.
The outer ring of the top plug fills with debris. https://www.webstaurantstore.com/vitamix-062984-lid-plug/HP7... This one really pisses me off. It'd be so easy to redesign the plug to eliminate the cavity.
The second is the underside of the pitcher, between the side wall and the center spindle. This one is only annoying. Can't find a pic, but this is the pitcher. https://thingsaroundthehouse.com/vitamix-7500-vs-5200/
I use looped pipe cleaners to scrub these cavities clean.
I could fully disassemble my former KitchenAide's pitcher to clean every component. Alas, the Vitamix does better with all the big leafy greens I now consume.
InstaPot
I like the cord unplugs from the appliance. This should be the norm.
Where do I put the cord? Inside the pot? Great, now I have to clean the cord too. Or rinse the pot before using it again. Sometimes I kinda fold the cord and stuff it thru the top handle.
I've had a single Vitamix for...huh, well over a decade, at any rate, and I've never had this problem with pretty consistent heavy use the whole time we've owned it. Pretty consistently cleaned according to directions, which are as described upthread.
Not easy to clean. :( Not impossible, but if anything gets caked on there, rather annoying.
Also the lid gets scummy, not hard to wipe off, but there are enough snooks and crannies that it is a bit irritating.
I loved my Magefesa pressure cooker. So easy to clean. Its design is very nearly the pinnacle of human achievement. I damaged the valve and that tiny plastic insert cost almost as much as a whole new unit, so I decided to try the InstaPot that everyone was crazy about.
I cannot fathom how someone ends up designing the InstaPot. They must have started with a CrockPot.
I do like the timer. Next time I'll upgrade my stove and stick with the dumb pot.
The problem with cleaning an instant pot is not the metal pot itself, but the body and lid.
the vitamin blender, for cleaning, fill it water, some dish soap, and blend for 45 seconds at full power, then rinse out.
For the instant pot. It’s just a regular pot. Take it out and stick it in the dishwasher. I agree with your point in general but those are dead simple to manage.