Vehicles have been all electricky and computery doodady since the 90's. Tacomas and Corollas.
Computers (actually simple integrated circuits linked to relays) are statistically far more reliable than mechanical moving parts.
But to answer your question, no, they do not last forever. Nothing does. The parts will fail eventually. The question comes down to how efficiently the maker designed their systems, how much the electricky parts cost, and how easy they made it to replace.
My opinion? Buy whatever the maker makes the most of. Flagship products typically get the best engineers, the best designs, and the highest production numbers. With high production numbers typically comes lower parts costs.
(For example, I'm a Ford guy... I stick to F-150's with either V-8's or more recenty EcoBoost V-6's... Why? Because they make the greatest profit for Ford, therefore best engineers design them (within reason), and the parts are plentiful.)
