Honestly I wish we would do it a lot more than we do. Old buildings were designed for old uses, and trap us into continuing use patterns that don’t make sense anymore.
Case in point, Herndon is finally moving forward with tearing down this old Subaru dealership to build an arts and recreation center. This could be a great development with a lot of benefit to downtown (particularly as more dense residential also comes online a couple of blocks away). But it had to dick around with knee-jerk “this building is old and so we can’t touch it” nonsense for way too long.