Micro example is that you can't scale rds/cloud db disk size downward easily, only upwards, so if you haven't sorted out go archiving before hand you may be stuck paying more for storage until you have both migrated data away and done the extra leg work to scale back down.
Macro examples:
cases where there are incentives to use for a period e.g. sustained use or yearly discounts
Incentives to use proprietary technology such as S3 or dynamodb being cheap.
Situations where migrations are hard (data), expensive (cold storage) or dangerous/slow to recover such as changing the DNS
Macro examples: cases where there are incentives to use for a period e.g. sustained use or yearly discounts Incentives to use proprietary technology such as S3 or dynamodb being cheap. Situations where migrations are hard (data), expensive (cold storage) or dangerous/slow to recover such as changing the DNS