The marginal cost to keep a large-ish spot instance running 99% of the time is dirt cheap (eg $400/mo to keep one extra c7g.8xlarge running). If you're paying

The marginal cost to keep a large-ish spot instance running 99% of the time is dirt cheap (eg $400/mo to keep one extra c7g.8xlarge running). If you're paying for an engineering team, that's a rounding error.