It's not "disregarded", it's eclipsed by a need to ship often and ship a lot. There is a tendency to overstate amount of problems that come from bugs because they are painful to debug. Therefore, somewhat experienced programmers are often too defensive and suspect to paralysis by analysis (of which uber-complicated and rigid typing is a sort). Even if some advanced typing system will save a few days of debugging after refactoring down the line, it doesn't matter if a competitor ships buggy RoR-based systems a few months earlier.
Advanced typing/static analysis is not a pinnacle of software engineering, it's a set of training wheels. Useful? Yeah. But sometimes you may need to skip them.
Advanced typing/static analysis is not a pinnacle of software engineering, it's a set of training wheels. Useful? Yeah. But sometimes you may need to skip them.