I absolutely LOVE my Provari Mini. It is usually my constant companion when I'm out and about. Topped with a Kayfun Lite+ or Smoktech RSST, at around 1.6-1.8 ohms, it is the most consistent and convenient vaping set I up I've got. However, it is not the end-all, be-all set up for me. It just happens to be my favorite out and about device.
For me, devices are like tools. And like all tools, every one has its uses. I own a Provari Mini, a SVD, a few eGo twists, a Chi You clone mech mod, and an authentic Shotgun mech mod. They all see different uses and I would replace any of them if one of them broke. The SVD serves as a back up unit, if ever I have to send in the Provari for repair. It also makes for the best battery level tester, since it's telescopic, for my mech mod batteries. The eGo's are my batteries that go with me when I'm roughing it. Be it fishing, camping, or going to a not so great part of town. I'd rather lose a $25 eGo than my Provari. The 2 mech mods are my RDA devices. I have 2 RDA's, dedicated to different types of flavors (one for fruits, one for dessert vapes).
The key is each topper for each device is built to match those devices. And if you mount a topper built for one device onto another, of course you're going to have a lesser experience. You're using the wrong tool for the job.
I know a lot of people are really attached to their favorite device. I'm actually quite sentimental about my Provari since it was my anniversary present from my wife. But I also understand and appreciate the uses of all my other devices, knowing that if all I had was that Provari, my choices would be much more limited than it currently is for me.