[bluGill]

Linux is less then 40 years old. Most of the people who designed it are still alive. How will the situation be in 40 years when the current maintainers are dead? (reiserfs comes to mind - it was just becoming great when [censored] and filesystems in linux went backward for many years, will that be allowed to happen next time?)

There are systems still in use from the 1960s (maybe before) - the original authors are at least retired and likely dead. I question how well the replacements understand all that. Sure they have had to dig in and understand some parts, but what about the parts that just keep working and don't need new features?