The one for me is Shopvacs:

1. You can and should buy the "vacuum cleaner bags" for them. They work just like the ones in your sweeper in the house and contain 99% of the dirt in them, so the interior drum and interior K&N looking filter stay Day One brand new forever.
2. People call the wet/dry vacuums and use them as such. By people, I mean morons. These should be a single function device. Dry or Wet. Heck, buy two and label them Dry and Wet. Unless you are a Cleaning Nazi pre and post wet use, clean and dry the drum, interior K&N filter assembly and internals, it will develop SuperAIDS and smell like a dumpster fire at a Thai restaurant. I have a shop vac. Every human authorized to operate it knows it is never to be used for wet pickup or I will climb to the top rope and give them the People's Elbow. They also know to check the bag, where the extra bags are and not use it if they can't figure out how to change it.

Seems silly, but it smells like wine and roses on the inside and the interior is lickably clean. And I'm sure these actions will increase the lifespan by 50% or more vs. Suckitup Johnny.