Comment by viraptor

Or you're realistic about what you're doing. Will you ever need to scale more than 10x? And on the timescales where you do grow over 10x, would it be better to reconsider/re-architect everything anyway?

I mean, I'm looking after a 4 instance Aurora cluster which is great feature wise, is slightly overprovisioned for special events, and is more likely to shrink than grow 2x in the next decade. If we start experiencing any issues, there's lots of optimisations that can be still gained from better caching and that work will be cheaper than the instance size upgrade.