Not exactly, but that's why we have different certificates, endorsements, and type ratings that show demonstrated competence with each type of airplane.
A popular aircraft type is likely to be built for 20+ years and be flying for 40 or more. The 737 was rolled out in 1967, and the fourth generation is still being built. This is rather like a major chunk of the world's computing infrastructure running on Fortran (F77, F90... 2008, 2023).
Not exactly, but that's why we have different certificates, endorsements, and type ratings that show demonstrated competence with each type of airplane.