The same things you do in a code base 3 years old. We've just made it fashionable to evolve a code base until we hit a wall, toss it in the trash, and start ove

The same things you do in a code base 3 years old. We've just made it fashionable to evolve a code base until we hit a wall, toss it in the trash, and start over with the next "modern" tech that will eliminate the problems of the previous code base. Rinse/repeat. If the business still exists and is continuing to evolve 15 years later, why shouldn't the code base?