overengineered

adjective2

1. •
   Made more complicated than necessary, often intentionally.
2. •
   Designed for greater strength or other greater capability than is reasonably warranted by the principal purpose of the object, in anticipation of heavier duty or longer duty cycles than the standard use cases would predict.

   • They were ruled out as over-engineered and too expensive for mass production, and lost out to Class 141 and '142' railbuses, and then Class 150s. — 2023