exactly! try finding another 25 year old motor in any vehicle with 500k+ km that runs with the reliability of our beloved 4BD1's.
Generic 25 year old car problems are there, but stuff all of them are related to the motor. Worn wires, earth straps, motor mounts, bearings, hoses, drive shafts, electrical gremlins etc... all normal for a car of this age and should be treated as such with good preventative maintenance.

