Totally fair point on the butterfly keyboards - I skipped that particular model by chance. If dell or anyone else had a design fault,
Regarding the others… respectfully what on earth are you doing to them that you’ve had to replace them that frequently? That’s more often that I replace actual consumeble parts that have real wear like USB cables and the likes.
I avoid eating and drinking in front of the computer (hygienic).
But a little sticky liquid is enough. A drop of something hard is also enough. I was able to rescue a ThinkPad by popping out a key and clean the mechanism with isopropyl. Another one was sadly killed by the power-button, which got defunct. But a 20 Euro keyboard safes it.
Don’t underestimate how much devices get killed by simple stuff like lose hinges, defective trackpads and so on. People are often careful, often not and usually helpless when it is damaged.
The water holes in the ThinkPads existed for…reasons. But it doesn’t help if people tilt them in sheer panic.
Regarding the others… respectfully what on earth are you doing to them that you’ve had to replace them that frequently? That’s more often that I replace actual consumeble parts that have real wear like USB cables and the likes.