I started vaping when most of the earlier changes had already happened. The two things that improved my vaping experience the most were :
1- adjustable air flow, and
2- KGD
Overall, we are still early in the game and the major changes are yet to come. Here's a post i read in a different thread :
Our current vaping methodology, using resistance coils, wicks and gravity/vacuum liquid feeding is so 20th Century (if not 19th!). Juice feeding and vapor temperature should not be tied to airflow. The debate over the best wicking medium should be practically non-existent. Leaking should not be a real probability. Resistance coils are one of the least efficient (if not the least) electrical means of producing heat. But, alas, I see them as the primary source of vaping products for the foreseeable future. Why? $$$
Once the politicians and bureaucrats decide the fate of the vaping community; falling somewhat to our side, I'm optimistically thinking; money, science, technology and human ingenuity will be allocated to the industry. Why? It's currently over a BILLION dollars a year (with much more to come); pure capitalism. I'm seeing e-juice precisely, consistently and variably fed into a ceramic cup, precisely and variably heated by a battery-powered infrared system, creating an AMAZING vape. I don't really know. I'm no hydro-thermal engineer. Who knows? Apple may have a design in the works or in the vault already. Anyone interested in an iVape or iCig?
Such a device will not be cheap, however. Most schlumps like myself will be stuck with the antiquated technology we currently use for the next decade, purely because of economic reasons. The new stuff will be wicked expensive. IP in the form of patents, copyrights and trademarks will slow the infusion of the technology to the masses. China will be prohibited from selling their "clones" anywhere that has signed international IP treaties. Ordering directly from Fasttech may be our only chance at reasonable pricing altogether, hoping that our orders don't get confiscated at the ports/borders. (I don't want to get into a huge IP discussion. I believe innovators should be rewarded for their efforts. But I hope we can all agree that the current state of IP in the world is, at best, dysfunctional.)
The mechs and RDAs will continue much unchanged. They are art, hobby, collectable and competitive pursuits; much like painting, dance, sport, music or restoring classic cars.
We are at the infancy of a new industry. Not something we often see anymore. BIG money/business has not gotten involved yet, as they're awaiting the regulatory/taxing fallout. Once things have settled, I can see 3M creating a purpose-built wicking medium out of their Nextel Ceramic technology. I see GE and TI developing amazing mass-produced chipsets, specifically for regulated mods that are very affordable (approximately $10). I see a section at Walmart that sells nic base, PG, VG, flavorings and incredible, affordable pre-made e-liquid. (What does it cost to produce e-liquids in large batches, $ .06-.10 per ml?)
The vaping industry has seen drastic advances over the last few years. We can expect to see a continual, drastic evolution over the next few.