I somewhat agree with ramer, to a degree. I don't believe there is much advancement left within the VLF Induction Balance technology, but I wouldn't characterize it in such stark terms.
I firmly believe that Pulse Induction technology holds the most hope for ID'ing specific metal types, rather than just a conductive range. I applaud First Texas for making it's serious commitment to it's research in that area!
As to it's lack of newly named detectors over the last several years, so be it. While other brands have put many "new" detectors to market, they haven't really produced any ground breaking results performance wise IMO, only very marginal benefits. While First Texas has only made upgrades to some of their machines, those upgrades have provided meaningful changes in their operationiol performance. I don't necessarily need a new name as long as there is advances! It's funny, with all the "new" detectors on the market, they are still compared performance wise to the F75! After all these yrs. with updated features it is still one of the top performing detectors available. Once again, IMO.
I for one, have taken advantage of the upgrades to the F75 and G2 (+), along with their significant price drops and purchased both over the last several yrs. I'm in a comfortable place now with the detectors I have, and have no sense of urgent need of a new detector, UNTIL such time as new grounbreaking technology comes to market. Until then, I can wait patiently with what I have, I'll make no jokes, or be cynically critical of First Texas for not bringing me a new detector soon enough. When what they are developing is ready, It'll be here. I'll wait till then to make any judgement.