Maybe I'm dumb. I am not even taking about distributed systems here. I'm taking about basic high availability configuration. Two web servers, two (or three) db server instances for HA. I have had paying enterprise customers from day 1, and I don't want them screaming at me for systems going down.

And as soon as you have two of anything, all the above start mattering.

If none of this actually is an issue for you and your customers, I'll say your are very lucky.