In so far as the answer isn’t what gwern already pointed out, bigger, more visible and ambitious software projects take longer to realize, you’re more likely to hear about failures, and may not be viable until more of the operational kinks get worked out with more managable projects. As much novel stuff as DL has enabled we’re still not quite mature enough that a generalist is wise to pull DL tools into a project that doesn’t clearly require them.
In so far as the answer isn’t what gwern already pointed out, bigger, more visible and ambitious software projects take longer to realize, you’re more likely to hear about failures, and may not be viable until more of the operational kinks get worked out with more managable projects. As much novel stuff as DL has enabled we’re still not quite mature enough that a generalist is wise to pull DL tools into a project that doesn’t clearly require them.