Electrostatic speakers are not a new technology, they have been around for many years. The longest lasting electrostatic speaker I am aware of is the Quad ESL 63 which was first manufactured in 1957 and is still being manufactured today. There are many other electrostatic speakers that have been around for 20-30 years or more and are still going strong.
The main reason electrostatic speakers last so long is because there are no moving parts. The only thing that can wear out on an electrostatic speaker is the stator (the part that produces the static charge) and even then it would take many years of use before it needs to be replaced.
So if you are looking for a speaker that will last a lifetime, an electrostatic speaker should be at the top of your list!