Legacy infrastructure grows organically to meet business needs as and when they emerge. Each new deployment, upgrade or reassessment has the organisation’s best interests at heart at the time, but often the result is a siloed IT environment that struggles to integrate.
This requires a lot of management and maintenance, traditionally resulting in the large infrastructure teams that are evident in many organisations today. Whilst this is not necessarily a bad thing itself, it consumes a lot of resources that can be utilised elsewhere. And constantly upgrading legacy systems can be a laborious and expensive task.