Anyone who used the phrase "measly" in relation to three nines is inadvertently admitting their lack of knowledge in massive systems. 99.9 and 99.95 is the target for some of the most common systems you use all day and is by no means easy to achieve. Even just relying on a couple regional AWS services will put your CEILING at three nines. It's even more embarrassing when people post that one GH uptime tracker that combines many services into 1 single number as if that means anything useful.
Three 9s is a perfectly reasonable bar to expect for services you depend on. Without GitHub my company cannot deploy code. There is no alternative method to patch prod. In addition many development activities are halted, wasting labor costs.
We wouldn’t couple so much if we knew reliability would be this low. It will influence future decisions.