I don't know about just the past 6 months, but past 10-20 years, sure? I think software today has to handle much more varied and complicated I/O at a much bigger scale than it did in the past. Website UI/UX has to accommodate not only numerous browsers, but numerous devices with different viewing spaces. Think of how much broke when Python was rejiggered to not implicitly typecast unicode data. Think about all the legacy databases that can't handle spaces or various non-alphanumeric characters.

The userbase for software in the early 2000 was built for a much, much smaller audience than it is today. And I'm not sure the huge improvements in testing/debugging and general software development would totally mitigate that, in the same way modern military defense systems is still way behind modern offensive weaponry.