Upgrading is very much your choice. There are plenty of products available at this time to suit just about everyone.
My daughter and I have been, very slowly, upgrading our equipment over the last 4 years, since we discovered vaping. We started out with Blu disposables, discovered that ecigs could keep us from craving cigarettes (we had both quit cold turkey around 10 years ago, but the desire to smoke never left us; stress about moving across the country and cravings were starting to make smoking again seem really good). We moved up to Blu starter kits, and they satisfied us, but we got tired of the inconsistent quality control with the prefilled cartos - this was right around when Blu sold out to Lorillard - and the fact that refilling Blu cartos was a pain in the donkey. We moved on to 808 cigalike kits, and were happy with them. The cartos were easy to refill, we were not stuck with using prefilled cartos, we had CHOICES about flavors. However, we got tired of certain flavors gunking up the cartos, and once they are dead, they are dead. By that time, I had discovered ECF, and I started exploring. After a lot of reading, I decided that Kanger Evods would be our next step up. It took a few months before we could afford to make the change, but once we did, we were very happy. The coils cost around the same as the refillable cartos we had been using, but the big bonus was that we could clean and reuse the coils. We moved from Protank Mini 2 clearos to Evod Glass, still using Kanger single coils, and enjoyed our vape. When I had to order a new Evod Glass clearo for my daughter, due to the fact that hers had met a very untimely death on the concrete driveway, she decided to try the dual coil that came with it. Another step up, from single coils to dual coils.
This Christmas was another step up. I am a diehard New York Rangers hockey fan - I born and raised in Brooklyn, NY - and my daughter remembered me mentioning that the Evod 650 mah batteries that we were still using had a hard time keeping up with my chain vaping during the Stanley Cup Playoffs. She and her boyfriend decided to get me a CoolFire IV (which I had mentioned as being a possible next step up for all of us), and let me know about it so that she could find out if the site they were looking at was legitimate. She also mentioned that she might be interested in moving up a bit, but preferred to stick with the stick form of battery.
I got my CoolFire IV - which I love as much as I was hoping I would - and got my daughter the Innokin VV v3, which she is enjoying. I was stuck on what to get for her boyfriend. She mentioned that when they visited a local vape shop he was very interested in the clouds other customers were putting out. I asked here on ECF, and the responses were pretty much what I had already thought, so I got him the Kanger Subtank Mini. He is extremely happy with it, and blowing out clouds. Success all around with upgrades.
Don't be in a hurry to upgrade if what you have is working for you. Read, research, ask questions. Decide what is important to you, and go from there.