I own regulators going back to the 1960's... The soft goods tend not to last that long, BC's, hoses etc, but the metal bits are fine. Just take care of it. If you're diving that infrequently I would have recommended purchasing used where you could have gotten higher quality gear and saved money, but if you're happy that's all that matters.
Regarding the goals, what you have done to date is not really relevant, it's what you WANT to do. What got you into diving? What intrigues you etc. If cave or sidemount or deep wrecks etc are intriguing, unfortunately nothing but the fins will be able to go with you. If you are happy with recreational diving, then it doesn't really matter, because that gear will last. Your first stage is comparable to a Scubapro MK2 which has been mostly unchanged since the 60's....