I still maintain the CD LPMud driver for Genesis MUD at https://github.com/cotillion/cd-gamedriver.
There is not very much activity though since most critical issues have been fixed over the years and the game is very stable.
My experience is that customers don't really care that much about small amounts of downtime no matter what size you are, people mostly get that unexpected stuff happens as long as you don't get hacked or misplace their data. Customers might complain a bit but seldom leave because of a few hours downtime.
This seems to mostly hold true to developers also, GitHub manages to survive just fine after all.
Netflix works because they move content close to the users. This is done by either having the ISP establish a peering connection directly to Netflix hosted servers or by having the ISPs host "Open Connect Appliances" which cache the most requested content. These appliances are based on FreeBSD.
The AWS egress savings from this setup must be immense.
I think those of us who have had to suffer through ClearQuest, Lotus notes etc have an entirely different scale on how bad things can be compared to those who appear to really really hate Jira today. I'm not a fan of Jira but atleast it loads, eventually.
The mitigation against this was probably the restriction on password resets which support lifted. They just forgot to train support how to deal with it.
Most pizza-places here attempt to avoid the "(wolt|foodora) tax" price increase for pickups by offering free drinks if you call and order instead of doing it through the app.
Wouldn't be surprised if they start splitting into separate legal entities soon to get out of the pickup price matching restrictions.
At this scale you pretty much need to apply some sort of DDoS scrubbing service. Your ISP might already have one they can route traffic through or if you have your own AS you can let a DDoS service announce the target prefixes.
A game i run was recently hit with a 102 Ggbps CLDAP reflection attack. We were down for a while until our ISPs DDoS protection detected it after that we were mostly unaffected. If the attack is difficult to separate from legitimate traffic you'll still suffer though.