Don't get me wrong, I love my Vamo and MVP, I just think it is time I join the fun peoples and get one
I used to have a Vamo and an eVic, too. After my ProVari arrived, I tried to resist and insist my beloved eVic was just as good as my ProVari. I loved the display, I loved the ability to track the data on my useage, etc. Then, I started noticing the difference in vapor quality between the two. It was hard to keep my eyes closed. I ended up selling both of those mods to make room for my second ProVari.
Nothing wrong with keeping your old devices, and you may not notice the difference between the Vamo and the ProVari. If you don't, then vape on! Don't be surprised, however, if your experience is similar to mine...