Thing is that you cannot do 24/7 oncall with two person and Opus 5.5 . Also bus factor start to be pretty big if there is only two persons etc. There is still reasons why FAANGS are so big.
Sure you can, as long as nobody complains too much about problems during night if those 2 people can work overtime every now and then.
You can probably even promise 99% uptime (sounds good enough to most buyers probably?) even if people sleep 8 hours a day as long as the failures comes no earlier than than 15 minutes into their sleep and only happens at most once a month (1% of 30 days is 7,8 hours).
