I have several speakers that I liked over the years which I have kept and still using regularly. For example, B&W 801 Matrix S3, German Physiks Unicorn II and Borderland iV, Wilson Audio WP7, all over or 20 years old. I have a 3-way KEF that I bought as a student 40 years ago and still plays as new. All in original condition. Therefore they can last, if you take care of them and are held at appropriate conditions. Personally, I avoid upgrades, unless not functioning, which has not happened yet.
How long should high quality speakers last?
My Zu Omen Def MKii (rev B) are going on 13-14 years old. The speakers sound wonderful. I have no intention of parting with them. The speakers came with the latest ZU tweeter design. How long should I expect the speakers to last without any issues? I do not abuse the speakers and run them with my Luxman 595ase amp.